Chloroazol Black BH

Description

Chloroazol Black BH · CAS 2429-73-4 · C32H21N6Na3O11S3. UNII EE5HVP9RA8. Solubility: 10 to 50 mg/mL at 64 °F (NTP, 1992).

Identification

CAS Registry Number	2429-73-4
PubChem CID	17057
Molecular formula	C32H21N6Na3O11S3
IUPAC name	trisodium;5-amino-3-[[4-[4-[(7-amino-1-hydroxy-3-sulfonatonaphthalen-2-yl)diazenyl]phenyl]phenyl]diazenyl]-4-hydroxynaphthalene-2,7-disulfonate
UNII (FDA)	EE5HVP9RA8

Computed Descriptors

Molecular Weight	830.7
Hydrogen Bond Donor Count	4
Hydrogen Bond Acceptor Count	17
Rotatable Bond Count	5
Exact Mass	830.01235187
Monoisotopic Mass	830.01235187
Topological Polar Surface Area	339
Heavy Atom Count	55
Formal Charge	0
Complexity	1590

Physical & Chemical Properties

Solubility	10 to 50 mg/mL at 64 °F (NTP, 1992)

Physical description & handling notes

• Direct blue 2 is a dark blue-black powder. (NTP, 1992)
• Dark blue-black solid; [CAMEO]

GHS Hazard Classification

Reported hazard statements	H315 (50%), H319 (100%), H335 (50%), H350, H361

Documented Uses

• Used as dye for cellulose fibers, leather, and paper; [HSDB]
• Pulp and Paper Processing [Category: Industry]
• Leather Tanning and Processing [Category: Industry]
• Textiles (Printing, Dyeing, or Finishing) [Category: Industry]
• DYE FOR CELLULOSE FIBERS, LEATHER AND PAPER
• DIAZOTIZATION & COUPLING OF BENZIDINE WITH 8-AMINO-1-NAPHTHOL-3,6-DISULFONIC ACID, THEN COUPLING WITH 7-AMINO-1-NAPHTHOL-3-SULFONIC ACID

Synonyms

2429-73-4; Chlorazol Black BH; C.I. Direct Blue 2; DIRECT BLUE 2; Direct Black BH; Bencidal Navy Blue BH; Diazo Black BH; Navy Blue EHBL; Diazophenyl Black BH; Brasilazol Black BG; Melantherine BH; Indoxine KL; Diazine Black H; Melantherine BHX; Pheno Navy Blue; Pontamine Deep Blue BH

Frequently Asked Questions

What are the CAS number and molecular formula of Chloroazol Black BH?

CAS 2429-73-4; molecular formula C32H21N6Na3O11S3; molecular weight — g/mol.

What other names is Chloroazol Black BH known by?

2429-73-4, Chlorazol Black BH, C.I. Direct Blue 2, DIRECT BLUE 2, Direct Black BH, Bencidal Navy Blue BH.

Is Chloroazol Black BH classified as hazardous?

Hazard statements reported: H315, H319, H335, H350, H361.

What are the key physical properties of Chloroazol Black BH?

Solubility: 10 to 50 mg/mL at 64 °F (NTP, 1992).

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.