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2,7-Naphthalenedisulfonicacid,4-amino-3-[2-[4'-[2-(2,4-diaminophenyl)diazenyl][1,1'-biphenyl]-4-yl]diazenyl]-5-hydroxy-6-(2-phenyldiazenyl)-,sodium salt (1:2) (1937-37-7)

Identification
Name:2,7-Naphthalenedisulfonicacid,4-amino-3-[2-[4'-[2-(2,4-diaminophenyl)diazenyl][1,1'-biphenyl]-4-yl]diazenyl]-5-hydroxy-6-(2-phenyldiazenyl)-,sodium salt (1:2)
Synonyms:Chlorazol Black E (6CI);Ahco Direct Black GX;Aizen Direct Deep Black EH;Amanil Black WD;Atlantic Black BD;Atlantic Black E;Atlantic Black GG;Atlantic Black GXOO;Azocard Black EW;Belamine Black GX;Benzanil Black E;Benzo Leather Black E;Black 2EMBL;Brasilamina Black GN;C.I. 30235;Calcomine Black EXL;Chloramine Black C;Chloramine Black ERT;Chlorazol Black EA;ChlorazolBurl Black E;
CAS:1937-37-7
EINECS: 217-710-3
Molecular Formula: C34H25N9Na2O7S2
Molecular Weight: 781.72
InChI: InChI=1/C34H27N9O7S2.2Na/c35-22-10-15-27(26(36)18-22)41-38-24-11-6-19(7-12-24)20-8-13-25(14-9-20)40-42-32-28(51(45,46)47)16-21-17-29(52(48,49)50)33(34(44)30(21)31(32)37)43-39-23-4-2-1-3-5-23;;/h1-18,44H,35-37H2,(H,45,46,47)(H,48,49,50);;/q;2*+1/p-2/b41-38+,42-40?,43-39+;;
Molecular Structure: (C34H25N9Na2O7S2) Chlorazol Black E (6CI);Ahco Direct Black GX;Aizen Direct Deep Black EH;Amanil Black WD;Atlantic Bla...
Properties
Melting Point: 109-110°C
Density:1.61g/cm3
Stability:Stable under normal temperatures and pressures.
Refractive index:1.768
Solubility:Soluble
Appearance:Gray-black microcrystals or black powder.
Specification:

1. Storage: Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
2. Handling: Avoid ingestion and inhalation. Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed.
3. Personal Protection: Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
4. Fire Fighting: Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: Use agent most appropriate to extinguish fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
5. Reactivity Profile Direct Black 38 is an azo compound. Azo, diazo, azido compounds can detonate. This applies in particular to organic azides that have been sensitized by the addition of metal salts or strong acids. Toxic gases may form with acids, aldehydes, amides, carbamates, cyanides, inorganic fluorides, halogenated organics, isocyanates, ketones, metals, nitrides, peroxides, phenols, epoxides, acyl halides, and strong oxidizing or reducing agents. Flammable gases form with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides. Incompatible with strong acids [NTP, 1992)].

Report:

NTP 10th Report on Carcinogens. IARC Cancer Review: Animal Sufficient Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 29 (1982),p. 295.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Human Limited Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 29 (1982),p. 295.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) . Reported in EPA TSCA Inventory. NTP Carcinogenesis Bioassay (feed): Clear Evidence: rat NCICTR* NCI-TR-108,78; No Evidence: mouse NCICTR NCI-TR-108,78. On Community-Right-To-Know List.

Storage Temperature: Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Color: Grey-black powder
Usage:Direct black 38 can be used to: (1) dye cellulose, wool, silk, bast, and hog's hair, (2) printermediate cellulose, wool and silk, (3) dye leather, plastics, vegetable-ivory buttons and wood flour used as a resin filler, (4) stain wool, silk, acetate, nylon, wood and biological materials, and (5) produce aqueous inks. It has reportedly been used in hair dyes.
Safety Data
Hazard Symbols T:Toxic
 

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