Difference between revisions of "Picric acid"
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== Description == | == Description == | ||
| − | A yellow acid dye. Picric acid was prepared in 1771 by Woulfe by treating [ | + | A yellow acid dye. Picric acid was prepared in 1771 by Woulfe by treating [[indigo|indigo]] with [[nitric%20acid|nitric acid]]. It was first used as a textile dye for [[wool|wool]] and [[silk|silk]]. Picric acid has poor washfastness and was replaced by naphthol dyes by the late 1800s. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
Revision as of 10:18, 10 May 2016
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.)
Other Properties
Soluble in water, ethanol, ether
| Composition | C6H3(NO2)3O |
|---|---|
| CAS | 88-89-1 |
| Melting Point | 122 |
| Density | 1.77 |
| Molecular Weight | mol. wt. = 229.11 |
Hazards and Safety
Flammable solid. Flash point = 150 C. Explosive at 300C.
Harmful by ingestion, inhalation, and skin absorrption. Contact causes irritation.
Mallinckrodt Baker: MSDS
Additional Information
A.Scharff, "Synthetic dyestuffs for textiles and their fastness to washing" in ICOM Preprints, Lyon, 1999. p.654-660.-