alpha-Naphtholbenzein

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Product Short Description: alpha-Naphtholbenzein Indicators α-Naphtholbenzein
Product Technical Specification:

Specifications:

 

MOLECULAR FORMULA    C27H20N2O3
MOLECULAR WEIGHT  
392.50
392.50
392.50
392.50
392.50
392.50
ABSORPTION MAXIMUM WEVELENGTH MAX 622 - 626 nm
SPECIFIC ABSORPTIVITY A 1%     (on dried basis)      700 to 950
LOSS ON DRYING (AT 1050 C )   Max 5.0%
pH Range 

pH 8.5                                   -          pH 9.8

Reddish Orange (APRICOT) - Greenish Blue ( TURQUIOSE BLUE )
Remarks:
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PHENOLPHTHALEIN COMPLEXONE

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Product Short Description: PHENOLPHTHALEIN COMPLEXONE
Product Technical Specification:
C.A.S. No. 25296-54-2
M.W. 608.56gm/mole

Specifications:

Appearance Off White Powder
Solubility 0.1% ( in 0.1N NaOH) Clear solution
Absorption Maximum(in 0.1N NaOH) ?max 556-560nm
Absorptivity (A1%/1cm, in 0.1N NaOH at ?max) >300
Loss on drying (110°C) <5%
Remarks:
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ERIOCHROME BLACK T ACS GRADE

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Product Short Description: ERIOCHROME BLACK T (ACS GRADE) Metal Titration Indicator
Product Technical Specification:
C.A.S. No. 1787-61-7
CI NO. 14645
M.F. C20H12N3NaO7S
M.W. 461.38gm/mole

Specifications:

Solubility 0.1 % (Dist. Water) Clear solution
Absorption Maximum (at pH 10.0 Ammonia Buffer + 2ml 0.05M E.D.T.A.) ?max 610-630nm
Absorptivity (A1%,1cm at ?max at pH10.0 Ammonia Buffer + 0.05M E.D.T.A.) >300
Loss On Drying (110°C) <1%
Suitability as indicator for Metal Titration Passes test
Remarks:

CAS 1787-61-7,7647-14-5

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o-CRESOLPHTHALEIN

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Product Short Description: o-CRESOLPHTHALEIN colour pH indicator helpful for determination of calcium content
Product Technical Specification:
C.A.S. No. 596-27-0
M.F. C22H18O4
M.W. 346.38gm/mole

Specifications:

Dye Content (by Spectrophotometry) >95%
Appearance White-Off white powder
Solubility 0.1% (EtOH) Clear solution
Transition Range pH 8.2-9.8
  Colorless-Red
Absorption maximum (0.1N NaOH) at ?max 564-568nm
Absorptivity (A1%1cm in 0.1N NaOH at ?max) >1670
Loss On Drying (110°C) <1%
Remarks:
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BROMOCRESOL GREEN ACS GRADE

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Product Short Description: BROMOCRESOL GREEN ACS GRADE pH indicator
Product Technical Specification:

 

C.A.S. No. 76-60-8
M.F. C21H14Br4O5S
M.W. 698.04gm/mole

Specifications:

Dye Content (by Spectrophotometry) >95%
Transition Range pH 3.8-5.4
  Greenish Yellow-Blue
Solubility 0.1% (95% EtOH) Clear solution
Absorption maximum (pH 3.8) ?1max 438-443nm
Absorption maximum (pH 5.4) ?2max 615-618nm
Absorptivity (A1%/1cm at pH 3.8 at ?1max) 240-270
Absorptivity (A1%/1cm at pH 5.4 at ?2max) 530-570
Loss On Drying (110°C) <3%
Remarks:
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AZURE A

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Product Short Description: Dark Greenish Black Powder soluble in water.
Product Technical Specification:
C.A.S. No. 531-53-3
CI NO. 52005
M.F. C14H14CIN3S
M.W. 291.80gm/mole

Specifications:

Appearance Powder
Colour Blue
Dye Content (by Spectrophotometry) >75%
Solubility 0.1% (Dist. Water) Clear solution
Absorption Maximum (Dist.Water) ?max 628-633nm
Absorptivity (A1%, 1cm in Water, at ?max on dried substance) >1120
Loss On Drying (110°C) <8%
Suitability for microscopy Passes test
Remarks:

Handle and store under argon. Glove bag item.

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AURIN p-ROSOLIC ACID

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Product Short Description: AURIN p-ROSOLIC ACID is yellowish or deep-red crystals with greenish metallic luster organic compound
Product Technical Specification:
C.A.S. No. 603-45-2
CI NO. 43800
EC Number 210-041- 8

Specifications:

Dye Content (by Spectrophotometry) >85%
Solubility 0.1% (EtOH) Clear solution
Absorption maximum (Ethanol +5ml 1N HCl) ?max 482-487nm
Absorptivity (A1%/1cm, in Ethanol + 5ml 1N HCl at ?max) >2000
Loss On Drying (110°C) <3%
Remarks:

Dye content 85 %
Dyes, Stains & Indicators - p-Rosolic Acid

HSN Code : 32049000  
IMDG Identification : Not Regulated for Transport (Non-Haz)  
Molecular Formula : C19H14O3
Molecular Weight : 290.31 

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Magneson Reagent

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Product Short Description: BLUE COLOUR DYE.IT IS USED FOR DETECTION OF MG IN SALT ANALYSIS. It is also commonly used as a violet dye pH indicator, appearing yellow below pH 11, and violet above pH 13.
Product Technical Specification:
Molecular Formula:C12H9N3O4,  Chemical Name:4-(4-NITROPHENYLAZO)
Remarks:
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1-NAPHTHOLPHTHALEIN

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Product Short Description: pH Indicator pH 7.3 colorless to reddish; 8.7 greenish to blue
Product Technical Specification:
C.A.S. No. 596-01-0,
Physical State : Black Powder
Insoluble in water
M.F. C28H18O4
M.W. 418.45gm/mole

Specifications:

Solubility 0.1 % (95% EtOH) Almost Clear solution
Absorption maximum (in 0.1N NaOH) ?max 650-654nm
Absorptivity 1%/1cm (in 0.1N NaOH) at ?max >650
Loss On Drying (110°C) <3%
Melting Point Range 238-240 °C(lit.)
Remarks:

Range7.1(brownish)-8.3(blue/green) Water Solubility  Insoluble in water. Soluble in ethanol.

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