2-Amino-5-chloro-4-methylbenzenesulfonic acid
- CAS NO.：88-53-9
- Empirical Formula: C7H8ClNO3S
- Molecular Weight: 221.66
- MDL number: MFCD00043924
- EINECS: 201-839-7
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-06-04 16:00:12
What is 2-Amino-5-chloro-4-methylbenzenesulfonic acid?
Description
2-Amino-5-chloro-4-methylbenzenesulfonic acid is a colorless to slightly reddish crystalline powder. The compound is obtained by chlorination of p-toluenesulfonic acid to form 3- chloro-4-methylbenzenesulfonic acid, subsequent nitration of this acid to a mixture of nitro isomers, precipitation of the 2-chloro-4-methyl-6-nitrobenzenesulfonic acid with sodium chloride solution, and, finally, Bechamp reduction of the nitro group with iron and acetic acid. The compound is used as Lake Red C and CLT Acid as a diazo component for azo dyes and azo pigments.
Chemical properties
White to pink powder. Essentially insoluble as free acid; soluble as sodium or ammonium salt.
The Uses of 2-Amino-5-chloro-4-methylbenzenesulfonic acid
Intermediate for azo pigments.
Properties of 2-Amino-5-chloro-4-methylbenzenesulfonic acid
| Density | 1.553±0.06 g/cm3(Predicted) |
| Water Solubility | Practically insoluble in water |
| form | Powder |
| pka | -1.59±0.50(Predicted) |
| color | White to Light yellow to Light orange |
| CAS DataBase Reference | 88-53-9(CAS DataBase Reference) |
| EPA Substance Registry System | Benzenesulfonic acid, 2-amino-5-chloro-4-methyl- (88-53-9) |
Safety information for 2-Amino-5-chloro-4-methylbenzenesulfonic acid
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation |
| Precautionary Statement Codes |
P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P280:Wear protective gloves/protective clothing/eye protection/face protection. |
Computed Descriptors for 2-Amino-5-chloro-4-methylbenzenesulfonic acid
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