Styphnic acid

• 2,4,6-trinitro- 1 ,3- dihydroxybenzene
• 2,4,6-trinitro- 3- hydroxyphenol
• Oxypikrinsäure

Yellow, hexagonal crystals

Fixed

1.83 g · cm -3

175.5 ° C

257 ° C ( deflagration )

• Poorly in water
• Soluble in ethanol and diethyl ether

Risk

Template: Infobox chemical / molecular formula search available

Styphnic acid is an aromatic nitro compound, which forms yellow crystals. It is a dibasic acid. The salts of the styphnic are called Styphnate. The lead salt, Styphnate is used in blasting technology in Zündsätzen.

Production and representation

Styphnic acid is prepared by reacting resorcinol with sulfuric acid, followed by nitration with nitric acid Resorcindisulfonsäure.

Properties

• Yellow, hexagonal, astringent -tasting crystals.
• If almost colorless by sublimation under high vacuum and turns through air contact again yellow to yellow-brown.
• Deflagrate upon rapid heating.
• Slightly soluble in cold water, soluble in hot water.
• Slightly soluble in ethanol, ethyl acetate and ether. Crystallized from glacial acetic acid as a solvate.
• Styphnic forms complexes with organic compounds ( aromatic hydrocarbons ) addition compounds with characteristic melting points.

The connection is considered to be relatively weak explosive that detonated by strong initial spark. The explosive force is slightly higher than that of TNT. Important explosion indicators are:

• Explosion heat 3312 kJ · kg -1.
• Lead block expansion cm3/10 284 g
• Impact sensitivity of 7.4 N · m
• Friction sensitivity to 353 N pin load no reaction
• Steel sleeve test limit diameter 14 mm

Use

His lead salt Styphnate serves as a primary explosive in Zündsätzen.