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CARMINIC ACID For Microscopy

C.I.No.75470 Used as a red colouring agent.
Natural Red 4

COAs

Packings

1 g (00001)

5 g (00005)

1CLVI00055 1GBA000015
Print friendly version
Article No. 02550 Grade For Microscopy
Purity 98% CAS No. 1260-17-9
Molecular Formula C22H20O13 Molecular Weight 492.40
H.S. Code 3203.0090 Shelf Life 60 Months

Physical Properties

Physical state at 20 °C Solid Colour Red
Odour Odorless pH value 4.8 - 6.2
Solubility in water [% weight] Appreciable (> 10%)

Specifications

Appearance Dark brownish red powder Assay (acidimetric; on dried basis) Min 98%
Loss on drying (at 105°C) Max 7.0% Suitability (for microscopy) Passes test
Absorption maxima at pH 3.0 490 - 495 nm Specific absorptivity 1%/1cm (at λmax) Min 130

Safety Information and Hazard Symbols

Safety Statement: 22-24/25
Revision Date: 17-Apr-2014

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