Agent Name

Azure blue

CAS Number

57455-37-5

Formula

Unspecified

Major Category

Dyes

Synonyms

C. I. 77007; C.I. Pigment Blue 29; Pigment Blue 29; Ultramarine (pigment); Ultramarine Blue; Ultramarine blue pigment; [ChemIDplus]

Category

Other Dyes

Description

An inorganic, reddish-blue powder pigment and one of the three synthetic ultramarines; The structure is a "three-dimensional aluminosilicate lattice" containing ionic sulfur groups. Azure blue is "derived from china clay by calcination." [Ullmann]

Sources/Uses

During the Middle Ages, ultramarine was used by artists as the "blue from over the sea." It was derived from the semiprecious stone, lapis lazuli, imported from Afghanistan. Since 1828 when it was first synthesized, the supply of the pigment has become abundant. Ultramarine pigments are used in plastics, paints, printing inks, paper, artist colors, laundry detergents (optical brightener), and toys. [Ullmann]

Comments

"A nuisance dust." [Sax] Safe in manufacture and use with the only known hazard being the evolution of hydrogen sulfide after contact with acid; it is not irritating, sensitizing, or mutagenic; [Ullmann]

Links to Other NLM Databases
Toxicity Information

Search TOXNET

Chemical Information

Search ChemIDplus

Related Information in HazMap
Processes

Industrial Processes with risk of exposure:

Activities

Activities with risk of exposure: