Name | 1-amino-7-naphthol |
Synonyms | CYANOL 8-AMINO-2-NAPHTOL 1-amino-7-naphthol 8-AMINO-2-NAPHTHOL 8-Amino-2-naphthol 8-aminonaphthalen-2-ol 2-Naphthalenol, 8-aMino- 7-HYDROXY-1-NAPHTHYLAMINE 8-Amino-2-hydroxynaphthalene |
CAS | 118-46-7 |
EINECS | 204-252-4 |
InChI | InChI=1/C10H9NO/c11-9-5-7-3-1-2-4-8(7)6-10(9)12/h1-6,12H,11H2 |
Molecular Formula | C10H9NO |
Molar Mass | 159.18 |
Density | 1.1202 (rough estimate) |
Melting Point | 206-210°C(lit.) |
Boling Point | 284.68°C (rough estimate) |
Flash Point | 161.6°C |
Water Solubility | slightly soluble |
Solubility | soluble in Methanol |
Vapor Presure | 3.52E-05mmHg at 25°C |
Appearance | Grey-brown powder |
Color | Gray to brown |
pKa | pK1: 4.20(+1) (25°C) |
Storage Condition | Room Temprature |
Sensitive | Light Sensitive |
Refractive Index | 1.6070 (estimate) |
MDL | MFCD00004031 |
Physical and Chemical Properties | colorless crystals. Melting point 158 ℃, can sublimate. Soluble in hot water and ethanol. The aqueous solution and ferric chloride appeared green blue. |
Use | For the preparation of azo dyes. |
Hazard Symbols | Xi - Irritant |
Risk Codes | 36/37/38 - 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 - Wear suitable protective clothing. S37/39 - Wear suitable gloves and eye/face protection |
WGK Germany | 2 |
RTECS | QL3331000 |
TSCA | Yes |
HS Code | 29222990 |
Raw Materials | 1-Naphthylamine-7-Sulfonic Acid |
EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
use | used to make azo dyes. Used to prepare azo dyes The product can be acetylated to obtain 1-acetylamino-7-naphthol. Used to make neutral brown VRL, dark brown 5R, neutral black BRL and black BGL. 8-amino-2-naphthol can be obtained by acetylation 1-acetylamino-7-naphthol. Used to make neutral brown VRL, dark brown 5R, neutral black BRL and black BGL. |
Production method | It is obtained by alkali melting and acidification of 1, 7-naphthalenesulfonic acid (1, 7-cliffic acid). |
category | toxic substances |
toxicity classification | poisoning |
acute toxicity | vein-mouse LD50: 180 mg/kg |
flammability hazard characteristics | combustible; combustion produces toxic nitrogen oxide smoke |
storage and transportation characteristics | warehouse ventilation and low temperature drying |
fire extinguishing agent | dry powder, foam, sand, carbon dioxide, mist water |