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Cresol Red IND Grade Reagent

Cas Number:1733-12-6
Formula: C21H18O5S
Molar Mass:382.43
EC Number:217-064-2

Quantity:
  • IND
  • LABOR
  • 405733125

Congo Red IND Grade Reagent


Cas Number:573-58-0

Formula: C32H22N6Na2O6S2

Molar Mass:696.66

EC Number:209-358-4


Properties:

Brownish red powder. It is soluble in water, ethanol, slightly soluble in acetone, almost insoluble in ether. The maximum absorption wavelength (pH 7.3) is 488 nm (E1%1 cm595). The median lethal dose (rat, vein) is 190 mg/kg.


Usage:

Acid-base indicator, pH :3.0 (blue-violet) ~ 5.0 (red). The hydrochloric acid and paper acidity in the gastric juice can be measured. Determination of boric acid, cyanide. Additive for biological media. Biological staining, such as embryonic sectioning, plant mucin, cellulose, elastic tissue, etc.


Packing:

500g/25kg





Item of Analysis

Standard

pH discoloration domain

6.5(Yellow)~8.5(Purple)

Greatest absorption wavelength(λ1,pH6.5)/ nm

432~436

Greatest absorption wavelength(λ2,pH8.5)/ nm

571~574

Mass absorption coefficient(λ1,pH6.5 dry sample)/(L/cm·g)

49~67

Mass absorption coefficient(λ2,pH8.5 dry sample)/(L/cm·g)

100~132

Loss on drying,%

3.0 max

Residue on ignition(as SO4),%

0.2 max

Solubility in ethanol

to pass test



Not a hazardous substance or mixture.


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