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Indicators

Congo Red Indicator

RA001116 CAS 573-58-0 Microscopy

Identity

Product code
RA001116
CAS number
573-58-0
Grade
Microscopy
Molecular formula
C32H22N6Na2O6S2
Molecular weight
696.65

Classification

Technical Data

Properties

PropertyValue
Physical state at 20 °C Solid
Colour Brownish red powder
Odour Odorless
pH value 8 - 9.5
Solubility in water [% weight] Soluble in water

These are recorded catalogue property values. Product specification limits, where available, are listed under Specifications.

Specifications

ParameterSpecificationUnit
Appearance Brownish red powder —
Appearance of solution (1.0 g/L; water) almost clear to slightly turbid , red solution —
Transition range at pH 3.0 to pH 5.2 Violet to orange red —
Loss on drying (110 °C) Max 5.0 % %
Sensitivity test Passes test —

Packaging

Pack size SKU
25 g RA001116-PK-25G
100 g RA001116-PK-100G
1 kg RA001116-PK-1KG