Naphtol AS is a coupling agent in cotton dying.
Occupational dermatitis was reported in a woman
involved in needlework, probably sensitized from
occupational contact with clothes.
화학적 성질
beige powder
용도
Naphtol AS was used as off-the-shelf color-based anion sensors in organic solvents.
제조 방법
aniline and 3-Hydroxy-2-naphthoic acid?condensation.
위험도
Low toxicity by ingestion.
색상 색인 번호
Naphthol AS is a coupling agent in cotton dyeing, inducing
occupational dermatitis or contact allergy in consumers
in contact with cotton-dyed clothing. It has been
indirectly reported as a cause of occupational allergy due
to its coupling with Diazo Component 51, or as a crosssensitizer
or sensitizer associated with Pigment Red 23
in red parts of tattoos. Pigmented contact dermatitis is
usual in patients with a high phototype.
Purification Methods
Crystallise it from xylene or AcOH which forms plates m 243-244o [Schnopper et al. Anal Chem 31 1542 1959]. [Beilstein 12 H 505.]
