99-56-9
4-Nitro-o-phenylenediamine
CAS: 99-56-9
Molecular Formula: C6H7N3O2
99-56-9 - Names and Identifiers
| Name | 4-Nitro-o-phenylenediamine |
| Synonyms | 4-no 4-nop 4-nopd 4-n-o-pda nci-c03941 C.I. 76020 Nitroophenylenediamine 3,4-Diaminonitrobenzene 2-Amino-4-nitro aniline p-nitro-o-phenylenediamine 4-nitrobenzene-1,2-diamine 4-Nitro-o-phenylenediamine o-Phenylenediamine, 4-nitro- |
| CAS | 99-56-9 |
| EINECS | 202-766-3 |
| InChI | InChI=1/C6H7N3O2/c7-5-2-1-4(9(10)11)3-6(5)8/h1-3H,7-8H2 |
| InChIKey | RAUWPNXIALNKQM-UHFFFAOYSA-N |
99-56-9 - Physico-chemical Properties
| Molecular Formula | C6H7N3O2 |
| Molar Mass | 153.14 |
| Density | 1.3682 (rough estimate) |
| Melting Point | 199-201 °C (lit.) |
| Boling Point | 276.04°C (rough estimate) |
| Flash Point | 208.5°C |
| Water Solubility | 1.2 g/L (20 ºC) |
| Solubility | 1 N HCl: ethanol, 1:1: soluble50mg/mL |
| Vapor Presure | 2.68E-07mmHg at 25°C |
| Appearance | Powder |
| Color | Brown-red |
| Merck | 14,6622 |
| BRN | 608106 |
| pKa | 2.06±0.10(Predicted) |
| Storage Condition | Keep in dark place,Inert atmosphere,Room temperature |
| Stability | Stable. Incompatible with strong acids, strong reducing agents, strong oxidizing agents, acid chlorides, acid anhydrides. |
| Refractive Index | 1.6910 (estimate) |
| Physical and Chemical Properties | Dark red needle-like crystals. Melting Point 201 ℃, soluble in ethanol, acetone and hydrochloric acid solution, difficult to dissolve in water. |
| Use | Mainly used in the synthesis of drugs and synthetic pigments, dyes, etc |
99-56-9 - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R22 - Harmful if swallowed R43 - May cause sensitization by skin contact R68 - Possible risk of irreversible effects R40 - Limited evidence of a carcinogenic effect R36/37/38 - Irritating to eyes, respiratory system and skin. R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. |
| Safety Description | S36/37 - Wear suitable protective clothing and gloves. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36 - Wear suitable protective clothing. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S22 - Do not breathe dust. |
| UN IDs | 2811 |
| WGK Germany | 3 |
| RTECS | ST2975000 |
| TSCA | Yes |
| HS Code | 29215119 |
| Hazard Class | 6.1 |
| Packing Group | II |
| Toxicity | LD50 oral in rat: 681mg/kg |
99-56-9 - Reference Information
| (IARC) carcinogen classification | 3 (Vol. 16, Sup 7) 1987 |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | reagents for the synthesis of α-keto acids; Detection of selenium. mainly used in the synthesis of drugs and synthetic pigments, dyes, etc. used in the synthesis of α-keto acid; Used as a reagent for the detection of selenium |
| production method | 23.8 g2, 4-dinitroaniline, A mixture of 95% ml of ethanol and ML of concentrated aqueous ammonia was heated to 45 ° C., and hydrogen sulfide gas was introduced with stirring to maintain the reaction at 45-55 ° C. As shown in Fig. After completion of the reaction, the reaction mixture was cooled, and 4-nitroo-phenylenediamine was precipitated. The crude product obtained by filtration is dissolved in hydrochloric acid, decolorized by adding activated carbon, filtered while hot, and the filtrate is neutralized with concentrated ammonia water, filtered, washed with water, and dried to obtain a finished product with a yield of 52-58%. |
| category | toxic substances |
| toxicity grade | poisoning |
| Acute toxicity | oral-rat LD50: 681 mg/kg; Oral-mouse LD50: 681 mg/kg |
| flammability hazard characteristics | flammability; Toxic NOx smoke from combustion |
| storage and transportation characteristics | warehouse ventilation and low temperature drying |
| fire extinguishing agent | dry powder, foam, sand, carbon dioxide, water mist |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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