Carminic Acid 98% AR For Microscopy
C.I.No.75470 Used as a red colouring agent.
Natural Red 4
Product Code. |
00694 |
Grade |
For Microscopy |
Purity |
98% |
CAS No. |
1260-17-9 |
Molecular Formula |
C22H20O13 |
Molecular Weight |
492.40 |
H.S.Code |
3203.00900 |
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%) |
Packaging
Specification
| Appearance | Dark brownish red powder |
| Assay (acidimetric; on dried basis) | Min 98.0% |
| 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 lmax) | Min 130 |
Safety Information and Hazard Symbols