EOSIN YELLOW

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Product Short Description: EOSIN YELLOW
Product Technical Specification:
C.A.S. No. 17372-87-1
CI NO. 45380
M.F. C20H6Br4Na2O5
M.W. 691.86gm/mole

Specifications:

Appreance RED/ORANGE POWDER 
Dye Content (Spectrophotometry) >90%
Solubility 0.1 % (Dist. Water) Clear solution
Absorption Maximum (Dist. water) ?max 515-518nm
Absorptivity (A1%,1cm in water at ?max) >1260
Loss On Drying (110°C) <8%
Suitability for microscopy Passes test
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EOSIN BLUE

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Product Short Description: EOSIN BLUE
Product Technical Specification:
C.A.S. No. 548-24-3
CI NO. 45400
M.F. C20H6Br2N2Na2O9
M.W. 624.09gm/mole

Specifications:

Dye content (By Gravimetry) >85%
Solubility 0.1 % (Dist. Water) Clear solution
Absorption maximum (Dist. water) ?max 516-520nm
Absorptivity (A1%1cm in water at ?max) >800
Loss On Drying (110°C) <8%
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2,6-DICHLOROPHENOL INDOPHENOL SODIUM SALT ACS GRADE

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Product Short Description: 2,6-DICHLOROPHENOL INDOPHENOL SODIUM SALT (ACS GRADE)
Product Technical Specification:
C.A.S. No. 620-45-1
M.F. C12H5Cl2NNaO22H2O
M.W. 326.11gm/mole

Specifications:

Solubility 0.1% ((50% EtOH +2ml Na2CO3) Clear solution
Absorption maximum (50% EtOH +2ml Na2CO3) ?max 640-645nm
Absorptivity (A1%/1cm, in 50% EtOH +2ml Na2CO3), at ?max >700
Interfering dyes test (according to ACS) Passes test
Loss On Drying (110°C) <12%
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4',5'-DIBROMOFLUORESCEIN

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Product Short Description: 4',5'-DIBROMOFLUORESCEIN
Product Technical Specification:
C.A.S. No. 596-03-2
M.F. C20H10 Br 2O5
M.W. 332.31gm/mole

Specifications:

Dye Content (by Spectrophotometry) >90%
Solubility 0.1 % (MeOH+1ml 1N HCl ) Clear solution
Absorption Maximum(MeOH+1ml 1N HCl) ?max 445-450nm
Absorptivity (A1% 1cm in Methanol+1ml 1N HCl at ?max) >300
Loss On Drying (110°C) <3%
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CROCEIN ORANGE G

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Product Short Description: CROCEIN ORANGE G
Product Technical Specification:
C.A.S. No. 1934-20-9
CI NO. 15970
M.F. C16H11N2SO4Na
M.W. 350.33gm/mole

Specifications:

Dye Content (by Spectrophotometry) >70%
Solubility in 0.1% (in Dist. Water) Clear solution
Absorption maximum (in Dist. water) 482-486nm
Absorptivity 1%/1cm at ?max >460
Loss On Drying (110°C) <5%
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m-CRESOL PURPLE

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Product Short Description: m-CRESOL PURPLE
Product Technical Specification:
C.A.S. No. 2303-01-7
M.F. C21H18O5S
M.W. 382.43gm/mole

Specifications:

Appearance Green to Brown Powder
Transition Range pH 7.4-9.0
  Brownish Yellow-Violet
Solubility 0.1%(50% EtOH) Clear solution
Absorption maximum (0.1N NaOH) ?max 578-584nm
Absorptivity 1%,1cm,(0.1 N NaOH, at ?max) 800-900
Loss On Drying (110°C) <3%
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CRESOL RED SODIUM SALT ACS GRADE

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Product Short Description: CRESOL RED SODIUM SALT (ACS GRADE)
Product Technical Specification:
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CRESOL RED ACS GRADE

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Product Short Description: CRESOL RED (ACS GRADE)
Product Technical Specification:
C.A.S. No. 62625-29-0
M.F. C21H17O5SNa
M.W. 404.42gm/mole

Specifications:

DYE CONTENT MIN 95%
Transition Range pH 6.5-8.8 ( Yellow-Purple )
  pH 0.5 - 1.8 ( Pink - Yellow )
Absorption maximum (pH 0.5) Lambda 1max 517 - 520nm
Absorption maximum (pH 2.5) Lambda 2max 432-437nm
Absorption maximum (pH 6.5) Lambda 3max 432-437nm
Absorption maximum (pH 8.8) Lambda 4max 571-575nm
Absorptivity (A1%/1cm at pH 0.5 at Lambda 1max) 1180-1230
Absorptivity (A1%/1cm at pH 2.5 at Lambda 2max) 490-540
Absorptivity (A1%/1cm at pH 6.5 at Lambda 3max) 490-540
Absorptivity (A1%/1cm at pH 8.5 at Lambda 4max) 1000-1050
Loss On Drying (110°C) <5%
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o-CRESOLPHTHALEIN COMPLEXONE

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Product Short Description: o-CRESOLPHTHALEIN COMPLEXONE
Product Technical Specification:
C.A.S. No. 2411-89-4
M.F. C32H32N2 O12
M.W. 636.62gm/mole

Specifications:

Solubility 0.1% (0.1N NaOH) Clear solution
Absorption maximum (0.1N NaOH) at ?max 572-578nm
Absorptivity (A1%1cm in 0.1N NaOH, at ?max on dried substance) >790
Loss On Drying (110°C) <6%
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CONGO RED

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Product Short Description: CONGO RED
Product Technical Specification:
C.A.S. No. 573-58-0
CI NO. 22120
M.F. C32H22N6Na2O6S2
M.W. 696.66gm/mole

Specifications:

Dye Content (by Spectrophotometry) >75%
Transition Range pH 3.0-5.2
  Violet-Orange Red
Solubility 0.1% (Dist. Water) Clear solution
Absorption Maximum (Dist.Water) ?max 495-499nm
Absorptivity (A1%, 1cm in Water, at ?max) >520
Loss On Drying (110°C) <5%
Suitability for microscopy Passes test

Mol. weight: 696.665 g/mol

Odor: Odorless.

Color: Red. Brownish-red. (Dark.)

pH (1% soln/water): 8.5 - 9.0 [Basic.]

Melting Point: >360°C (680°F) 

Solubility: Soluble in cold water. Very slightly soluble in acetone. Insoluble in diethyl ether. Soluble in Ethanol. Solubility in water: 1g/30 ml water

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