Sodium Meta Bi Sulfite Liq
- Part number
- RXSOL-42-1496-025
- Category
- Boiler Chemicals
- Brand
- RXSOL
Overview
Sodium metabisulfite is an inorganic compound frequently used as a disinfectant, antioxidant and preservative agent. It is used as a cleaning agent for potable water reverse osmosis membranes in desalination systems. It is also used to remove chloramine from drinking water after treatment.
Also used in printing and dyeing and dechlorination of textile after bleaching , sulphonated agent and reducer of chemical industry and pharmacy. Bleach of paper pulp,bamboo and timber bleach of stapk treatment agent of waste water , rubber solidifying agent , perfume industry is served as hydrocarbon perfume aldehyde.
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Molecular Formula |
Na2S2O5 |
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Molecular Weight |
190.10 |
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White or Yellowish crystalline powder |
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Technical specifications
|||
| 38 | 4 |
|---|
Density, lbs/gal @ 25 degreeC |||
| 10.9 | 11.3 ||| |
|---|
Applications
Dechlorination
When RO or NF membrane is used in the RO/NF process, the feed must be dechlorinated to prevent oxidation of the membrane. RO membranes have some chlorine tolerance before noticeable loss of salt rejection is observed. The first sign of chlorine attack on RO/NF membrane is loss of membrane flux followed by an increase in membrane flux and salt passage. Eventual degradation may occur after approximately 200–1,000 hours of exposure to 1 mg/L of free chlorine (200–1,000 ppm-h tolerance). The rate of chlorine attack depends on various feed water characteristics. Under alkaline pH conditions, chlorine attack is faster than at neutral or acidic pH. An acidic pH is preferred for better biocidal effect during chlorination. Chlorine attack is also faster at higher temperatures and higher concentrations of heavy metals (e.g., iron), that can catalyze membrane degradation. Since oxidation damage is not covered under warranty, Technical person always recommends removing residual free chlorine by pretreatment prior to exposure of the feed water to the membrane. Other oxidizing agents such as chlorine dioxide, hydrogen peroxide, ozone, and permanganate are capable of damaging RO/NF membranes also if not used properly.
Residual free chlorine can be reduced to harmless chlorides by activated carbon or chemical reducing agents. An activated carbon bed is very effective in the dechlorination of RO feed water according to following reaction:
C+2Cl2 +2H2O→4HCl+CO2
Sodium metabisulfite (SMBS) is commonly used for removal of free chlorine and as a biostatic. Other chemical reducing agents exist (e.g., sulfur dioxide), but they are not as cost-effective as SMBS.
When dissolved in water, sodium bisulfite (SBS) is formed from SMBS: Na2S2O5 + H2O → 2 NaHSO3
SBS then reduces hypochlorous acid according to: 2NaHSO3 + 2HOCl → H2SO4 + 2HCl + Na2SO4
In theory, 1.34 mg of sodium metabisulfite will remove 1.0 mg of free chlorine. In practice, however, 3.0 mg of sodium metabisulfite is normally used to remove 1.0 mg of chlorine.
The SMBS should be of food-grade quality and free of impurities. SMBS should not be cobalt-activated. Solid sodium metabisulfite has a typical shelf life of 4–6 months under cool, dry storage conditions. In aqueous solutions, however, sodium bisulfite can oxidize readily when exposed to air. A typical solution life can vary with concentration as follows:
Concentration (wt %) Solution life
10 1 week
20 1 month
30 6 months
Although the dechlorination itself is rapid, good mixing is required to ensure completion. Static mixers are recommended. The recommended injection point is downstream of the cartridge filters in order to protect the filters by chlorine. In this case, the SMBS solution should be filtered through a separate cartridge before being injected into the RO feed. Dechlorinated water must not be stored in tanks.
When RO/NF membranes are fouled with heavy metals such as Co and Cu, residual SBS (up to 30 ppm) partially converts to oxidants under the presence of excessive oxygen. When there is a heavy potential for metal fouling, SBS dosing amount control must be optimized and oxidation conditions of the concentrate must be monitored by an oxidation-reduction potential (ORP) meter.
The absence of chlorine should be monitored using an oxidation-reduction potential (ORP) electrode downstream of the mixing line. 175 - 200 mV threshold readings of the ORP have been typically applied. The electrode signal shuts down the high pressure pump when chlorine is detected.
Dosage and directions
Reaction :
1> When Sodium Meta-Bisulfite Reacts with water releases sulfur dioxide (SO2).
Released sulfur dioxide SO2 however makes the water a strong Reducing Agent.
2> Sodium metabisulfite releases sulfur dioxide in contact with strong acids
Na2S2O5 + 2 HCl → 2 NaCl + H2O + 2 SO2
3> On heating it releases sulfur dioxide, leaving sodium oxide behind.
Na2S2O5 → Na2O + 2 SO2
Characteristics and notes
- Mordant;
- Dechlorinating agent;
- Reducing agent and sulfonating agent;
- Bleaching agent for bamboo, wood, paper fiber;
- Flotation reagent for nonferrous metals; waste water treatment chemical
Safety and SDS
Read the safety data sheet before handling. Wear suitable gloves and eye protection.
View safety data sheet
| Product Name | RXSOL-19-1496 |
| Product Type | Sodium Meta Bi Sulfite Liquid |
Company Details:
RX MARINE INTERNATIONAL
105, A wing , BSEL , TECH PARK.
VASHI ,NEW BOMBAY 400703 INDIA
| Phone |
+91 22 65113333 / 5555 / 9999 / 27611360 |
| Fax | +91 22 2781 1318 :::AOH :0091 9821214367 |
| rxsolchemicals@gmail.com |
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Chemical Name |
CAS |
% by weight |
|
Sodium Meta Bi Sulfite Pwd. |
7681-57-4 |
40 |
| Distilled Water | 7732-18-5 | 60 |
Toxicological Data on Ingredients: Sodium metabisulfite: ORAL (LD50): Acute: 1131 mg/kg [Rat].
*See Section 16
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Potential Acute Health Effects |
Hazardous in case of skin contact (irritant), of ingestion, of inhalation. Slightly hazardous in case of skin contact (permeator),of eye contact (irritant). |
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Potential Chronic Health Effects |
Slightly hazardous in case of skin contact (sensitizer), of ingestion, of inhalation (lung irritant). CARCINOGENIC EFFECTS:3 (Not classifiable for human.) by IARC. MUTAGENIC EFFECTS: Mutagenic for bacteria and/or yeast. TERATOGENICEFFECTS: Not available. DEVELOPMENTAL TOXICITY: Not available. The substance may be toxic to upper respiratory tract,skin, eyes. Repeated or prolonged exposure to the substance can produce target organs damage. |
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Eye Contact |
Check for and remove any contact lenses. In case of contact, immediately flush eyes with plenty of water for at least 15 minutes. Cold water may be used. Get medical attention immediately. |
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Skin Contact |
In case of contact, immediately flush skin with plenty of water. Cover the irritated skin with an emollient. Remove contaminatedclothing and shoes. Cold water may be used.Wash clothing before reuse. Thoroughly clean shoes before reuse. Get medicalattention. |
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Serious Skin Contact |
Wash with a disinfectant soap and cover the contaminated skin with an anti-bacterial cream. Seek immediate medical attention |
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Inhalation |
If inhaled, remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical attention. |
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Serious Inhalation |
Not available. |
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Ingestion |
Do NOT induce vomiting unless directed to do so by medical personnel. Never give anything by mouth to an unconscious person. If large quantities of this material are swallowed, call a physician immediately. Loosen tight clothing such as a collar, tie, belt or waistband. |
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Flammability of the Product |
Non-flammable |
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Auto-Ignition Temperature |
Not applicable. |
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Flash Points |
Not applicable. |
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Flammable Limits |
Not applicable. |
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Products of Combustion |
Not available. |
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Fire Hazards in Presence of Various Substances |
Not available. |
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Explosion Hazards in Presence of Various Substances |
Risks of explosion of the product in presence of mechanical impact: Not available. Risks of explosion of the product in presence of static discharge: Not available. |
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Fire Fighting Media and Instructions |
Not applicable. |
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Special Remarks on Fire Hazards |
When heated to decomposition it emits toxic fumes of SOx, Na2O. Decomposes on heating to form sodium sulfate |
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Small Spill |
Use appropriate tools to put the spilled solid in a convenient waste disposal container. Finish cleaning by spreading water on the contaminated surface and dispose of according to local and regional authority requirements. |
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Large Spill |
Use a shovel to put the material into a convenient waste disposal container. Finish cleaning by spreading water on the contaminated surface and allow to evacuate through the sanitary system. Be careful that the product is not present at a concentration level above TLV. Check TLV on the MSDS and with local authorities. |
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Precautions |
Keep locked up.. Do not ingest. Do not breathe dust. Avoid contact with skin. Wear suitable protective clothing. In case of insufficient ventilation, wear suitable respiratory equipment. If ingested, seek medical advice immediately and show the container or the label. Keep away from incompatibles such as oxidizing agents, acids. |
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Storage |
Keep container tightly closed. Keep container in a cool, well-ventilated area. Moisture sensitive. Air Sensitive |
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Engineering Controls |
Use process enclosures, local exhaust ventilation, or other engineering controls to keep airborne levels below recommended exposure limits. If user operations generate dust, fume or mist, use ventilation to keep exposure to airborne contaminants below the exposure limit. |
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Personal Protection |
Safety glasses. Lab coat. Dust respirator. Be sure to use an approved/certified respirator or equivalent. Gloves. |
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Personal Protection in Case of a Large Spill |
Splash goggles. Full suit. Dust respirator. Boots. Gloves. A self contained breathing apparatus should be used to avoid inhalation of the product. Suggested protective clothing might not be sufficient; consult a specialist BEFORE handling this product. |
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Exposure Limits |
TWA: 5 (mg/m3) [United Kingdom (UK)] TWA: 5 (mg/m3) from ACGIH (TLV) [United States] TWA: 5 (mg/m3) from NIOSH [United States]Consult local authorities for acceptable exposure limits. |
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Physical state and appearance |
Liquid |
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Odor |
odor of sulfur dioxide |
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Taste |
Not available. |
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Molecular Weight |
190.13 g/mole |
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Color |
Clear to Pale |
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pH |
(1% soln/water): 4.3 [Acidic.] |
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Boiling Point |
Not available. |
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Melting Point |
Decomposition temperature: 150°C (302°F) |
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Critical Temperature |
Not available. |
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Specific Gravity |
>1.1 |
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Vapor Density |
Not available. |
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Volatility |
Not available. |
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Odor Threshold |
Not available. |
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Water/Oil Dist. Coeff |
Not available. |
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Ionicity (in Water) |
Not available. |
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Dispersion Properties |
Soluble |
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Solubility |
Easily soluble in cold water, hot water. Freely soluble in glycerol. Slightly soluble in alcohol. Moderately soluble in ethanol. |
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Stability |
The product is stable. |
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Instability Temperature |
Not available. |
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Conditions of Instability |
Incompatible materials, heat, moisture, air, dust generation. |
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Incompatibility with various substances |
Reactive with oxidizing agents, acids. |
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Corrosivity |
Non-corrosive in presence of glass. |
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Special Remarks on Reactivity |
Moisture sensitive Air sensitive. It slowly oxidizes to sodium sulfate upon exposure to air and moisture. Incompatible with sodium nitrite |
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Special Remarks on Corrosivity |
Not available. |
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Polymerization |
Will not occur. |
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Routes of Entry |
Inhalation. Ingestion. |
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Toxicity to Animals |
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Chronic Effects on Humans |
CARCINOGENIC EFFECTS: 3 (Not classifiable for human.) by IARC. MUTAGENIC EFFECTS: Mutagenic for bacteria and/or yeast. May cause damage to the following organs: upper respiratory tract, skin, eyes. |
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Other Toxic Effects on Humans |
Hazardous in case of skin contact (irritant), of ingestion, of inhalation. Slightly hazardous in case of skin contact (permeator). |
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Special Remarks on Toxicity to Animals |
Not available |
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Special Remarks on Chronic Effects on Humans |
May affect genetic material (mutagenic) based on animal test data. May cause adverse reproductive effects based on animal test data. |
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Special Remarks on other Toxic Effects on Humans |
Acute Potential Health Effects: Skin: May cause skin irritation. Eyes: May cause eye irritaiton. Inhalation: May cause respiratory tract irritation with coughing and wheezing. Ingestion: May be harmful if swallowed. May cause gastrointestinal tract irritation irritation with abdominal pain, nausea, vomiting, diarrhea, violent colic, and possible gastri hemorrhaging. May affect behavior/central nervous system and cause central nervous system depression/seizures. It may also affect the cardiovasular system (hypotension, tachycardia, cardiovascular collapse), Ingestion of sulfite compounds may cause a severe allergic reaction (anaphylactoid symptoms) in sensitive individuals and some asthmatics. Chronic Potential Health Effects: Skin: Prolonged or repeated skin contact may cause allergic dermatitis. Ingestion: Prolonged or repeated ingestion may affect the liver, urinary system, and metabolism (weight loss). Future exposures may also cause asthma like allergy with coughing, shortness of breath, wheezing and/or chest tightness. Inhalation: Prolonged or repeated inhalation may irritate the lungs, may cause bronchitis to develop with cough, phlegm and/or shortness of breath . |
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Ecotoxicity |
Not available. |
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BOD5 and COD |
Not available. |
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Products of Biodegradation |
Possibly hazardous short term degradation products are not likely. However, long term degradation products may arise. |
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Toxicity of the Products of Biodegradation |
The products of degradation are less toxic than the product itself. |
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Special Remarks on the Products of Biodegradation |
Not available. |
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Waste Disposal |
Waste must be disposed of in accordance with federal, state and local environmental control regulations |
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DOT Classification |
Not a DOT controlled material (United States). |
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Identification |
Not applicable. |
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Special Provisions for Transport |
Not applicable. |
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Federal and State Regulations |
Connecticut hazardous material survey.: Sodium metabisulfite Illinois toxic substances disclosure to employee act: Sodium metabisulfite Rhode Island RTK hazardous substances: Sodium metabisulfite Pennsylvania RTK: Sodium metabisulfite Minnesota: Sodium metabisulfite Massachusetts RTK: Sodium metabisulfite New Jersey: Sodium metabisulfite California Director's List of Hazardous Substances: Sodium metabisulfite TSCA 8(b) inventory: Sodium metabisulfite TSCA 4(a) ITC priority list: Sodium metabisulfite TSCA 8(a) PAIR: Sodium metabisulfite TSCA 8(d) H and S data reporting: Sodium metabisulfite: effective: 1/26/94; sunset: 6/30/98 |
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Other Regulations |
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OSHA |
Hazardous by definition of Hazard Communication Standard (29 CFR 1910.1200). EINECS: This product is on the European Inventory of Existing Commercial Chemical Substances. |
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Other Classifications |
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WHMIS (Canada) |
CLASS D-2A: Material causing other toxic effects (VERY TOXIC). |
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DSCL (EEC) |
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HMIS (U.S.A.): |
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Health Hazard |
2 |
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Fire Hazard |
0 |
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Reactivity |
0 |
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Personal Protection |
E |
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National Fire Protection Association (U.S.A.) |
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Health |
2 |
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Flammability |
0 |
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Reactivity |
0 |
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Specific hazard |
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Protective Equipment |
Gloves. Lab coat. Dust respirator. Be sure to use an approved/certified respirator or equivalent. Wear appropriate respirator when ventilation is inadequate. Safety glasses. |
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References : Not available.
Other Special Considerations : Not available.
The information above is believed to be accurate and represents the best information currently available to us. However, we make no warranty of merchantability or any other warranty, express or implied, with respect to such information, and we assume no liability resulting from its use. Users should make their own investigations to determine the suitability of the information for their particular purposes. In no event shall ScienceLab.com be liable for any claims, losses, or damages of any third party or for lost profits or any special, indirect, incidental, consequential or exemplary damages, howsoever arising, even if ScienceLab.com has been advised of the possibility of such damages.
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.
Availability
Sodium Meta Bi Sulfite Liq manufacturer supplier distributor in Mumbai, Kandla, Kolkata, Vizag, Chennai, India, Fujairah, Dubai, Sharjah, UAE, Gulf, Middle East, Muscat Oman, Kenya Africa. Get the best quality of Sodium Meta Bi Sulfite Liq at a competitive price from us. We have ready stock of Sodium Meta Bi Sulfite Liq in India, UAE Gulf, Oman, Kenya Africa. Contact us for bulk as well as small orders.
