Picric acid
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Description
A yellow acid dye. Picric acid was prepared in 1771 by Woulfe by treating Indigo with Nitric acid. It was first used as a textile dye for Wool and Silk. Picric acid has poor washfastness and was replaced by naphthol dyes by the late 1800s.
Synonyms and Related Terms
CI 10305; carbazitic acid; 2,4,6-trinitrophenol; picronitric acid; melinite; acide picrique (Fr.); ácido pícrico (Esp., Port.)
Risks
- Flammable solid. Flash point = 150 C. Explosive at 300C.
- Harmful by ingestion, inhalation, and skin absorption.
- Fisher Scientific: SDS
Physical and Chemical Properties
Soluble in water, ethanol, ether
| Composition | C6H3(NO2)3O |
|---|---|
| CAS | 88-89-1 |
| Melting Point | 122 C |
| Density | 1.77 g/ml |
| Molecular Weight | mol. wt. = 229.11 |
Contact causes irritation.
Resources and Citations
- A.Scharff, "Synthetic dyestuffs for textiles and their fastness to washing" in ICOM Preprints, Lyon, 1999. p.654-660.-