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Lab Chemical

Potassium Chromate Solution

Potassium chromate (K2CrO4, molecular weight 194.20, specific gravity 2.73, melting point 975 °C) is the indicator of the Mohr method: when all chloride in a sample has been precipitated by silver nitrate, the next drop of silver forms red-brown silver chromate, marking the end-point. RXSOL supplies a chloride-free 5% (w/v) aqueous solution (pH 8.6–9.8) in 500 ml poly bottles for boiler-water, cooling-water, drilling-fluid and potable-water chloride tests, together with 0.1 N silver nitrate, and the AR crystals for laboratory use (oxidant, colorimetric test for silver, qualitative analysis).
Part number
RXSOL-60-6187-500
Category
Lab Chemical
Brand
RXSOL
Potassium Chromate Solution

Overview

Potassium Chromate Indicator for Silver - Chloride Titrations. Chemical Manufacturer of Specialty Bulk Inorganic Chemicals, Reagents and Fine Organic Chemicals for Process Chemistry. Also refer this link http://rxmarine.com/silver-nitrate

Technical specifications

Physical State Liquid
Appearance yellow
Odor odorless
pH 8.6-9.8 (5% soln)
Vapor Pressure 0
Vapor Density Not applicable
Evaporation Rate Not applicable
Viscosity Not applicable
Boiling Point Not available
Freezing/Melting Point 975 deg C
Autoignition Temperature None reported
Flash Point Not available
Decomposition Temperature Not available
NFPA Rating (estimated) Health:
2; Flammability: 0;
Reactivity: 0
Explosion Limits, Lower None reported
Upper None reported
Solubility Soluble
Specific Gravity/Density 2.7320
Molecular Formula K2CrO4
Molecular Weight 194.20

Applications

Common laboratory chemical
Potassium chromate is  strong oxidant.
Suitability for chloride determination
Indicator for volumetric chloride determination.

Dosage and directions

Place 10 drops of sample water in a test tube and add 1 drop of 5% potassium chromate (K2CrO4) solution as indicator. Add dropwise 2.9% silver nitrate with the same dropper until a permanent and distinct colour change to a red brown colour occurs.
Potassium Chromate, 5% (w/v) Aqueous Solution; Chloride free 500mL; Poly bottle; Indicator for argentometric titrations
 
CAS 7732-18-5,7789-00-6,7761-88-8

Characteristics and notes

Unlike the less expensive sodium salt, potassium salt is mainly used for laboratory work in situations where an anhydrous salt is required. It is as an oxidizing agent in organic synthesis. It is used as in qualitative inorganic analysis, e.g. as a colorimetric test for silver ion. It is also used as an indicator in precipitation titrations with silver nitrate and sodium chloride (they can be used as standard as well as titrant for each other) as potassium chromate turns red in the presence of excess of silver ions.

Safety and SDS

Read the safety data sheet before handling. Wear suitable gloves and eye protection.

View safety data sheet
Product Name RXSOL-60-6187-500
Product Type Potassium Chromate Solution

Company Details:

RX MARINE INTERNATIONAL
105, A wing , BSEL , TECH PARK.
VASHI ,NEW BOMBAY 400703 INDIA

Phone +91 22 65113333 / 5555 / 9999
Fax +91 22 2781 1318 :::AOH :0091 9821214367
Email rxsolchemicals@gmail.com

 Mixture
 

Name
 
 Product identifier
 
w/w %
 
Classification (GHS-US)
 
Water
 
(CAS No.) 7732-18-5
 
95
 
Not classified
 
Potassium chromate
 
 (CAS No.) 7789-00-6
 
5
 
Skin Irrit. 2, H315
Eye Irrit. 2B, H320
Skin Sens. 1, H317
Muta. 1B, H340
Carc. 1A, H350
STOT SE 3, H335
Aquatic Acute 1, H400
Aquatic Chronic 1, H410

 

Classification Of The Substance Or Mixture
Classification (GHS-US)
Skin Irrit. 2          H315
Eye Irrit. 2B         H320
Skin Sens. 1      H317
Muta. 1B             H340
Carc. 1A             H350
STOT SE 3        H335


Label Elements
GHS-US labeling
Hazard pictograms (GHS-US)  :
                                                                  GHS07                     GHS08


Signal word (GHS-US)                  :       Danger
Hazard statements (GHS-US)     :       H315 - Causes skin irritation

                                                                   H317 - May cause an allergic skin reaction

                                                                   H320 - Causes eye irritation

                                                                   H335 - May cause respiratory irritation

                                                                   H340 - May cause genetic defects

                                                                   H350 - May cause cancer (inhalation)
Precautionary statements (GHS-US) :  P201 - Obtain special instructions before use

                                                                      P202 - Do not handle until all safety precautions have   been read and understood

Potassium Chromate Indicator Solution
Safety Data Sheet
according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations

________________________________________________________________________
P261 - Avoid breathing mist, spray, vapors.

P264 - Wash hands and forearms thoroughly after handling.

P271 - Use only outdoors or in a well-ventilated area

P272 - Contaminated work clothing should not be allowed out of the workplace

P273 - Avoid release to the environment

P280 - Wear eye protection, protective gloves, protective clothing.

P302+P352 - IF ON SKIN: Wash with plenty of soap and water

P304+P340 - IF INHALED: Remove person to fresh air and keep comfortable for breathing

P305+P351+P338 - If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

P308+P313 - IF exposed or concerned: Get medical advice/attention

P312 - Call a POISON CENTER or doctor if you feel unwell

P333+P313 - If skin irritation or rash occurs: Get medical advice/attention

P337+P313 - If eye irritation persists: Get medical advice/attention
P321 - Specific treatment (see see section 4)

P362+P364 - Take off contaminated clothing and wash it before reuse

P391 - Collect spillage

P403+P233 - Store in a well-ventilated place. Keep container tightly closed

P405 - Store locked up

P501 - Dispose of contents/container according to local, regional, national, and international regulations.


Other Hazards
Other hazards not contributing to the classification:
Hazardous to the aquatic environment – Acute Hazard Category 1.
Hazardous to the aquatic environment – Chronic Hazard Category 1.
H400 - Very toxic to aquatic life.
H410- Very toxic to aquatic life with long lasting effects.
Unknown acute toxicity (GHS US) Not available

Description Of First Aid Measures

General: Never give anything by mouth to an unconscious person. IF exposed or concerned: Get medical advice/attention.

Inhalation: When symptoms occur: go into open air and ventilate suspected area. IF exposed or concerned: Get medical advice/attention.

Skin Contact: Wash with plenty of soap and water. If skin irritation or rash occurs: Get medical advice/attention. Wash contaminated clothing before reuse.

Eye Contact: Rinse immediately with plenty of water. Obtain medical attention if pain, blinking or redness persist.

Potassium Chromate Indicator Solution
Safety Data Sheet
according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations

____________________________________________________________________

Ingestion: Rinse mouth. Do NOT induce vomiting. Obtain emergency medical attention.

Most Important Symptoms And Effects Both Acute and Delayed

General: Causes damage to organs through prolonged or repeated exposure. May cause genetic defects. May cause cancer.

Inhalation: May cause cancer by inhalation; May cause respiratory irritation.

Skin Contact: Causes skin irritation. May cause an allergic skin reaction.

Eye Contact: Causes eye irritation, redness and pain.

Ingestion: Ingestion may cause nausea, vomiting and diarrhea.

Chronic symptoms: Prolonged and frequent exposure through inhalation may cause cancer.
Indication Of Any Immediate Medical Attention And Special Treatment Needed
If you feel unwell, seek medical advice (show the label where possible).

Extinguishing Media

Suitable extinguishing media: Foam. Dry powder. Carbon dioxide. Water spray.

Unsuitable extinguishing media: Do not use a heavy water stream. Use of heavy stream of water may spread fire.

Special Hazards Arising From The Substance Or Mixture

Fire hazard: Not considered flammable but may burn at high temperatures.

Explosion hazard: Explosive when mixed with oxidizing substances.

Reactivity: May cause or intensify fire; oxidizer.

Advice For Firefighters
Precautionary measures fire: Not available

Firefighting instructions: Use water spray or fog for cooling exposed containers. Exercise caution when fighting any chemical fire. Do not allow run-off from fire fighting to enter drains or water courses

Protection during firefighting: Do not enter fire area without proper protective equipment, including respiratory protection.

Hazardous Combustion Products: Potassium oxides, Chromium oxides.
 

Reference To Other Sections
Refer to section 9 for flammability properties.

   

Personal Precautions, Protective Equipment And Emergency Procedures

General measures: Avoid all eyes and skin contact and do not breathe vapor and mist.

For Non-Emergency Personnel

Protective equipment : Use appropriate personal protection equipment (PPE).

Emergency procedures: Evacuate unnecessary personnel.

For Emergency Personnel

Protective equipment: Equip cleanup crew with proper protection.

Emergency procedures:Ventilate area.

Environmental Precautions

Prevent entry to sewers and public waters.

Methods And Material For Containment And Cleaning Up

For containment : Contain any spills with dikes or absorbents to prevent migration and entry into sewers or streams.

Methods for cleaning up: Absorb and/or contain spill with inert material, then place in suitable container.

Potassium Chromate Indicator Solution

Safety Data Sheet
according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations

________________________________________________________________________

Reference To Other Sections

See Heading 8. Exposure controls and personal protection

Precautions For Safe Handling

Hygiene measures: Handle in accordance with good industrial hygiene and safety procedures. Contaminated work clothing should not be allowed out of the workplace. Wash contaminated clothing before reuse.

Conditions For Safe Storage, Including Any Incompatibilities

Storage conditions: Keep only in the original container in a cool, well ventilated place away from :heat and direct sunlight. Keep container closed when not in use. Store locked up.

Incompatible materials: Reacts with (strong) oxidizers

Storage area: Store locked up

Specific End Use(s)
Laboratory Reagent 

Control Parameters

No Occupational Exposure limits have been established for the product or its components.

Additional information: Not available

Exposure Controls

Appropriate engineering controls: Emergency eye wash fountains should be available in the immediate vicinity of any potential exposure.

Personal protective equipment: Gas mask. Protective clothing. Gloves. Face shield.

Materials for protective clothing: Chemically resistant materials and fabrics
Hand protection: Wear protective gloves.

Eye protection: Chemical goggles or safety glasses.

Skin and body protection: Wear suitable protective clothing.

Respiratory protection: Use a NIOSH-approved respirator or self-contained breathing apparatus whenever exposure may exceed established Occupational Exposure Limits.

Environmental exposure controls: Not available

Other information: When using, do not eat, drink or smoke.

 Information On Basic Physical And Chemical Properties
         

Physical state
 
Liquid
 
Appearance
 
  Clear
 
Odor
 
 Odorless
 
Odor threshold
 
   Not available
 
pH
 
 Not available
 
Relative evaporation rate (butyl acetate=1)
 

  1 (water)

 Melting point
 
  < 2 °C (35.6 °F)
 
 Freezing point
 
 Not available  

Potassium Chromate Indicator Solution
Safety Data Sheet
according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations

Boiling point > 95 °C (203 °F)
Flash point     Clear
 
Auto-ignition temperature   Odorless
 
Decomposition Temperature     Not available
 
Flammability (solid, gas)   Not available
 
Lower flammable limit  

  1 (water)

Upper flammable limit   < 2 °C (35.6 °F)
 
Vapor pressure  Not available  
Relative vapor density at 20 °C  Not available  
Relative density    Not available  
Specific gravity density  Not available  
Solubility    Soluble in water.
Log Pow    Not available  
Log Kow  Viscosity, kinematic   Not available  
Viscosity, dynamic    Not available  
Explosion data - sensitivity to mechanical impact  Not available  
Explosion data - sensitivity to static discharge   Not available  

Reactivity   May cause or intensify fire; oxidizer.

Chemical Stability   Explosive when mixed with oxidizing substances.

Possibility Of Hazardous Reactions   Hazardous polymerization will not occur.

Conditions To Avoid   Direct sunlight. Extremely high or low temperatures.

Incompatible Materials   Strong acids. Strong bases. Avoid strong oxidizers. Reducing agents. Acid anhydrides.

Hazardous Decomposition Products   Potassium oxides. Chromium oxides.

  

Information On Toxicological Effects - Product

Acute toxicity  : Not classified

LD50 and LC50 Data Not available

Skin corrosion/irritation: Causes skin irritation.

Serious eye damage/irritation: Causes eye irritation.

Respiratory or skin sensitization: May cause an allergic skin reaction.

Germ cell mutagenicity : May cause genetic defects.

Teratogenicity: Not available

Carcinogenicity: May cause cancer (inhalation).

Specific target organ toxicity (repeated exposure): Causes damage to organs through prolonged or repeated exposure.

Reproductive toxicity: May damage fertility or the unborn child.

Specific target organ toxicity (single exposure): Causes damage to organs. May cause respiratory irritation.

Aspiration hazard: Not classified

Symptoms/injuries after inhalation: May cause respiratory irritation.

Symptoms/injuries after skin contact: Causes skin irritation. May cause an allergic skin reaction.

Symptoms/injuries after eye contact: Causes eye irritation. Redness, pain.


Information On Toxicological Effects - Ingredient(s)

Potassium Chromate Indicator Solution

Safety Data Sheet
according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations

LD50 and LC50 Data Not available

 Potassium chromate (7789-00-6)

                                                                           

  IARC group
 
  1


 

Toxicity

Very toxic to aquatic life with long lasting effects.

Persistence And Degradability

  Potassium Chromate Indicator Solution                         
  
 

Persistence and degradability
 

Not established.
 

Bioaccumulative Potential
 

  Potassium Chromate Indicator Solution                         
  
 
Bioaccumulative potential
 
Not established.

Mobility In Soil Not available

Other Adverse Effects

Other information: Avoid release to the environment.

Sewage disposal recommendations: This material is hazardous to the aquatic environment. Keep out of sewers and waterways.

Waste disposal recommendations: Dispose of waste material in accordance with all local, regional, national, provincial, territorial and international regulations.

Ecology - waste materials: Avoid release to the environment.

In accordance with ICAO/IATA/DOT/TDG

UN Number

UN-No.(DOT): 3139

DOT NA no.: UN3139

UN Proper Shipping Name

UN technical shipping descriptor  :  (Potassium chromate)

Department of Transportation (DOT) Hazard Classes : 5.1 - Class 5.1 - Oxidizer 49 CFR 173.128

Hazard labels (DOT) : 5.1 - Oxidizer

DOT Symbols : G - Identifies PSN requiring a technical name

Packing group (DOT) : III - Minor Danger
DOT Special Provisions (49 CFR 172.102) : 127 - Mixtures containing oxidizing and organic materials transported under this entry may not meet the definition and criteria of a Class 1 material. (See 173.50 of this subchapter.) 128Regardless of the provisions of 172.101(c)(12), aluminum smelting by-products and aluminum remelting by-products described under this entry, meeting the definition of Class 8, Packing Group II and III may be classed as a Division 4.3 material and transported under this entry. The presence of a Class 8 hazard must be communicated as required by this Part for subsidiary hazards. A2 - Single packaging are not permitted on aircraft.


Potassium Chromate Indicator Solution

Safety Data Sheet
according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations

______________________________________________________________________

IB2 - Authorized IBCs: Metal (31A, 31B and 31N); Rigid plastics (31H1 and 31H2); Composite (31HZ1). Additional Requirement: Only liquids with a vapor pressure less than or equal to 110 kPa at 50 C (1.1 bar at 122 F), or 130 kPa at 55 C (1.3 bar at 131 F) are authorized.


DOT Packaging Exceptions (49 CFR 173.xxx) : 152

DOT Packaging Non Bulk (49 CFR 173.xxx) : 203

DOT Packaging Bulk (49 CFR 173.xxx) : 241


Additional information

Emergency Response Guide (ERG) Number : 140

Overland transport    Not regulated for transport

Transport by sea

DOT Vessel Stowage Location :
B - (i) The material may be stowed ‘‘on deck’’ or ‘‘under deck’’ on a cargo vessel and on a passenger vessel carrying a number of passengers limited to not more than the larger of 25 passengers, or one passenger per each 3 m of overall vessel length; and (ii) ‘‘On deck only’’ on passenger vessels in which the number of passengers specified in paragraph (k)(2)(i) of this section is exceeded.

DOT Vessel Stowage Other :
56 - Stow ‘‘separated from’’ ammonium compounds,58 - Stow ‘‘separated from’’ cyanides,106 - Stow ‘‘separated from’’ powdered metal

Air transport

DOT Quantity Limitations Passenger aircraft/rail (49 CFR 173.27) : 2.5 L

DOT Quantity Limitations Cargo aircraft only (49 CFR 175.75) : 30 L

  US Federal regulations

 Potassium chromate (7789-00-6)
 
 
Listed on the United States TSCA (Toxic Substances Control Act) inventory
 
 
EPA TSCA Regulatory Flag
 
R - R - indicates a substance that is the subject of a Section 6 risk management rule under TSCA.
 
 Water (7732-18-5)
 
 
Listed on the United States TSCA (Toxic Substances Control Act) inventory
 
 

US State regulations


Potassium chromate (7789-00-6)

U.S. - Delaware - Pollutant Discharge Requirements - Reportable Quantities

U.S. - Louisiana - Reportable Quantity List for Pollutants

U.S. - Massachusetts - Oil & Hazardous Material List - Groundwater Reportable Concentration - Reporting Category 1

U.S. - Massachusetts - Oil & Hazardous Material List - Groundwater Reportable Concentration - Reporting Category 2

U.S. - Massachusetts - Oil & Hazardous Material List - Reportable Quantity

U.S. - Massachusetts - Oil & Hazardous Material List - Soil Reportable Concentration - Reporting Category 1

U.S. - Massachusetts - Oil & Hazardous Material List - Soil Reportable Concentration - Reporting Category 2

U.S. - Massachusetts - Right To Know List

U.S. - Massachusetts - Toxics Use Reduction Act U.S. - Michigan - Polluting Materials List

U.S. - New Jersey - Discharge Prevention - List of Hazardous Substances

U.S. - New Jersey - Right to Know Hazardous Substance List

U.S. - New Jersey - Special Health Hazards Substances List

 Potassium Chromate Indicator Solution

Safety Data Sheet
according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations

___________________________________________________________________

U.S. - New York - Reporting of Releases Part 597 - List of Hazardous Substances

U.S. - North Carolina - Control of Toxic Air Pollutants

U.S. - Pennsylvania - RTK (Right to Know) - Environmental Hazard List

U.S. - Pennsylvania - RTK (Right to Know) List

Canadian regulations

 Potassium Chromate Indicator Solution
 
 
WHMIS Classification
 
 

Class C - Oxidizing Material

Class D Division 2 Subdivision A - Very toxic material causing other toxic effects

Class D Division 2 Subdivision B - Toxic material causing other toxic effects

 Potassium chromate (7789-00-6)
 
 

Listed on the Canadian DSL (Domestic Substances List) inventory.

Listed on the Canadian Ingredient Disclosure List
 

 
WHMIS Classification
 
 

Class C - Oxidizing Material

Class D Division 2 Subdivision A - Very toxic material causing other toxic effects

Class D Division 2 Subdivision B - Toxic material causing other toxic effects
 

 Water (7732-18-5)
 
 

 Listed on the Canadian DSL (Domestic Substances List) inventory.
 

 
WHMIS Classification
 
 

 Uncontrolled product according to WHMIS classification criteria
 

This product has been classified in accordance with the hazard criteria of the Controlled Products Regulations (CPR) and the MSDS contains all of the information required by CPR. 

Data sources : This document has been prepared in accordance with the SDS requirements of the OSHA Hazard Communication Standard 29 CFR 1910.1200.

GHS Full Text Phrases:
 

   Aquatic Acute 1
 
 Hazardous to the aquatic environment - Acute Hazard Category 1
 

  Aquatic Chronic 1
 

 Hazardous to the aquatic environment - Chronic Hazard Category 1
 
Carc. 1A
 
Carcinogenicity Category 1A
 
Eye Irrit. 2B
 
Serious eye damage/eye irritation Category 2B
 
Muta. 1B
 
 Germ cell mutagenicity Category 1B
 
Skin Irrit. 2
 
skin corrosion/irritation Category 2
 
Skin Sens. 1
 
Skin sensitization Category 1
 
STOT SE 3
 
Specific target organ toxicity (single exposure) Category 3
 
H315
 
Causes skin irritation
 
 H317
 
May cause an allergic skin reaction
 
H335
 
May cause respiratory irritation
 
H340
 
May cause genetic defects
 
H350
 
May cause cancer
 
H400
 
Very toxic to aquatic life
 
H410
 
Very toxic to aquatic life with long lasting effects

Potassium Chromate Indicator Solution

Safety Data Sheet
according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations

_________________________________________________________________________

NFPA health hazard : 3 - Short exposure could cause serious temporary or residual injury even though prompt medical attention was given.


NFPA fire hazard : 2 - Must be moderately heated or exposed to relatively high temperature before ignition can occur.
 

NFPA reactivity : 1 - Normally stable, but can become unstable at elevated temperatures and pressures or may react with water with some release of energy, but not violently.

NFPA specific hazard : OX - This denotes an oxidizer, a chemical which can greatly increase the rate of combustion/fire.

HMIS III Rating

Health : 4 Severe Hazard - Life-threatening, major or permanent damage may result from single or repeated overexposures

Flammability : 1 Slight Hazard

Physical : 1 Slight Hazard

This information is based on our current knowledge and is intended to describe the product for the purposes of health, safety and environmental requirements only. It should not therefore be construed as guaranteeing any specific property of the product.

DISCLAIMER OF LIABILITY :The information in this SDS was obtained from sources which we believe are reliable. However, the information is provided without any warranty, express or implied, regarding its correctness. The conditions or methods of handling, storage, use or disposal of the product are beyond our control and may be beyond our knowledge. For this and other reasons, we do not assume responsibility and expressly disclaim liability for loss, damage or expense arising out of or in any way connected with the handling, storage, use or disposal of the product. This MSDS was prepared and is to be used only for this product. If the product is used as a component in another product, this MSDS information may not be applicable.

Request the signed SDS as PDF

Availability

Potassium Chromate Solution manufacturer supplier distributor in Mumbai, Kandla, Kolkata, Vizag, Chennai, India, Fujairah, Dubai UAE, Muscat Oman, Kenya Africa. Get the best quality of Potassium Chromate Solution at a competitive price from us. We have ready stock of Potassium Chromate Solution in India, UAE Gulf, Oman, Kenya Africa. Contact us for bulk as well as small orders.

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Frequently asked questions

How is the chloride test done with potassium chromate?

Take 10 drops (or a measured volume) of sample, add 1 drop of 5% potassium chromate, then add 2.9% silver nitrate drop by drop with swirling until the colour changes permanently from yellow to red-brown; count the drops or read the burette.

How do I prepare 5% potassium chromate indicator?

Dissolve 5 g K2CrO4 in 100 ml distilled water; add silver nitrate dropwise until a faint red precipitate persists, let stand 12 h, filter — this removes chloride.

Is potassium chromate hazardous?

Yes — hexavalent chromium, toxic and carcinogenic; handle with gloves, avoid dust and dispose of as chromium waste.