88-63-1
2,4-diaminobenzenesulfonic acid
CAS: 88-63-1
Molecular Formula: C6H8N2O3S
88-63-1 - Names and Identifiers
88-63-1 - Physico-chemical Properties
| Molecular Formula | C6H8N2O3S |
| Molar Mass | 188.2 |
| Density | 1.366 (estimate) |
| Melting Point | 260-266 °C (dec.) |
| Boling Point | 500°C (estimate) |
| Water Solubility | 1000g/L at 25℃ |
| Solubility | DMSO (Slightly, Heated), Methanol (Slightly) |
| Vapor Presure | 0Pa at 25℃ |
| Appearance | Brown crystalline powder |
| Color | White to Pale Yellow |
| BRN | 2694057 |
| pKa | 2.99±0.10(Predicted) |
| Storage Condition | -20°C Freezer, Under inert atmosphere |
| Refractive Index | 1.6490 (estimate) |
| MDL | MFCD00035772 |
| Physical and Chemical Properties | Characteristics of light brown crystals, crystals precipitated from water monoclinic crystals. soluble in hot water, slightly soluble in cold water, gradually turning brown in the air. |
| Use | Used as a dye intermediate |
88-63-1 - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | R36/38 - Irritating to eyes and skin. R43 - May cause sensitization by skin contact R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/39 - S37/39 - Wear suitable gloves and eye/face protection S36 - Wear suitable protective clothing. |
| UN IDs | 1759 |
| WGK Germany | 2 |
| RTECS | DB5900000 |
| HS Code | 29309090 |
| Hazard Class | 8 |
| Packing Group | III |
88-63-1 - Nature
Open Data Verified Data
light brown crystals, the crystals precipitated from water were monoclinic crystals. Soluble in hot water, slightly soluble in cold water, gradually turning brown in the air.
Last Update：2025-06-10 22:55:16
88-63-1 - Preparation Method
Open Data Verified Data
with 2,4 dinitrochlorobenzene as raw material, in the presence of magnesium oxide and sodium bisulfite sulfonation reaction, after cooling, adding hydrochloric acid into acid, after adding salt, cooling, static, suction filtration, centrifugal dehydration to 2,4-nitrobenzene sulfonic acid. Then, the mixture was placed in a reduction pan containing iron filings and hydrochloric acid, boiled, neutralized with Na2 C03, and then added with NaHS03, left to stand, and filtered with suction. The filtrate was concentrated, crystallized and centrifuged for dehydration to obtain the finished product.
Last Update：2022-01-01 10:55:36
88-63-1 - Application
Open Data Verified Data
mainly used in the manufacture of azo dyes, reactive dyes and so on.
Last Update：2025-08-19 16:24:40
88-63-1 - Safety
Open Data Verified Data
highly toxic, see aniline. Its packaging and storage See meta-aminobenzenesulfonic acid.
Last Update：2022-01-01 10:55:36
88-63-1 - Reference Information
| LogP | -4.65 |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Application | 2, 4-diaminobenzenesulfonic acid is used to improve polyamide (PA) in water treatment effective agents for chlorine resistance and water permeability of membranes. dye intermediates for the production of reactive yellow X-6G, reactive yellow X-HG, reactive brilliant blue K-6G, reactive yellow KD-3G, reactive yellow M-5G, reactive brilliant blue K-BR, reactive brilliant blue K-GR, reactive brilliant blue M-BR, weak acid bright red FC, acid medium brown RH, etc. |
| production method | is obtained by sulfonation and reduction of 2, 4-dinitrochlorobenzene. Raw material consumption quota: 2, 4-dinitrochlorobenzene 1800kg/t, sodium bisulfite (100%)1250kg/t, magnesium oxide (100%)310kg/t, hydrochloric acid (30%)500kg/t, soda ash (98%)190kg/t, iron powder 1800kg/t. |
Last Update：2024-04-09 21:01:54
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