Paranitroaniline
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Description
Yellow needles or powder. Paranitroaniline is used in the colorimetric test for lignin. The intensity of the color is proportional to the concentration of lignin in the sample.
- Wood pulp - brick red to dark orange color
- Mechanical pulp - orange
- Bleached sulfite pulp - yellow
Synonyms and Related Terms
p-nitroaniline; 4-nitroaniline; 1-amino-4-nitrobenzene; para nitro anilina (Esp.)
Other Properties
Soluble in ethanol, methanol, ether, benzene. Insoluble in water.
| Composition | NO2C6H4NH2 |
|---|---|
| CAS | 100-01-6 |
| Melting Point | 146-151 |
| Density | 1.437 |
| Molecular Weight | mol. wt. = 138.1 |
| Boiling Point | 332 |
Hazards and Safety
Highly toxic by skin absorption, ingestion and inhalation.
Combustible. Flash point = 199 C Explosion risk. Produces toxic fumes.
LINK: International Chemical Safety Card
Sources Checked for Data in Record
- Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942
- The Merck Index, Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996 Comment: entry 6681
- Book and Paper Group, Paper Conservation Catalog, AIC, 1984, 1989 Comment: Used in test for lignin