CARMINIC ACID
CARMINIC ACID For Microscopy
C.I.No.75470Used as a red colouring agent.
Short Name: CARMINIC ACID
Synonym: Natural Red 4
Basic Details
Article No.
LG1156
Grade
For Microscopy
Purity
98%
CAS No.
1260-17-9
HS Code
3203.0090
Shelf Life
60 Months
Packings Avialable
Physical Properties
Physical state at 20 °C
Solid
Colour
Red
Odour
Odorless
pH value
4.8 - 6.2
Solubility in water [% weight]
Appreciable (> 10%)
Chemical 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 & Hazard Symbols
Safety Statement
22-24/25