AZOCARMINE G
Synonym(s):Acid Red 101;Rosinduline
- CAS NO.：25641-18-3
- Empirical Formula: C28H19N3O6S2.Na
- Molecular Weight: 579.58
- MDL number: MFCD00042002
- EINECS: 247-157-3
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-01-13 11:21:28
What is AZOCARMINE G?
Chemical properties
Dark red or purple powder
The Uses of AZOCARMINE G
Azocarmine G (CAS# 25641-18-3) is an organic dye used as a redox indicator in titrations with chloramine-?T.
What are the applications of Application
Azocarmine G is a stain used for micoscopy. Azocarmine G may be used as a reference standard for the determination of the analyte in food and beverages.
Definition
ChEBI: An organic sodium salt having 7-phenyl-5-(4-sulfonatoanilino)benzo[a]phenazin-7-ium-3-sulfonate as the couterion.
Preparation
4-(Phenyldiazenyl)naphthalen-1-amine with aniline and aniline hydrochloride heating, the resulting Phenyl Rosinduline fuming sulfuric acid with two stlfonation, again as sodium salt out of segregation.
Properties and Applications
blue-ray red. Soluble in water for blue-ray red. The strong sulfuric acid for green, red precipitate after diluted. Add in aqueous solution hydrochloric acid have red precipitate; Add water to dissolve.
| Standard | Light Fastness | Soaping | Persperation Fastness | Oxygen bleaching | Fastness to seawater | |||
| Fading | Stain | Fading | Stain | Fading | Stain | |||
| ISO | 3 | 2-3 | 2 | 1-2 | 2 | |||
Properties of AZOCARMINE G
| form | Powder |
| Colour Index | 50085 |
| color | Maroon |
| Water Solubility | Soluble in water (1 mg/ml). |
| CAS DataBase Reference | 25641-18-3 |
| EPA Substance Registry System | Benzo[a]phenazinium, 7-phenylsulfo-5-[(4-sulfophenyl)amino]-, inner salt, monosodium salt (25641-18-3) |
Safety information for AZOCARMINE G
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. |
Computed Descriptors for AZOCARMINE G
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