CAS 1937-37-7: Direct Black 38
Description:Direct Black 38, with the CAS number 1937-37-7, is a synthetic azo dye primarily used in the textile industry for dyeing cotton and other cellulose fibers. This dye is characterized by its dark black color and excellent lightfastness, making it suitable for applications requiring durability. It is soluble in water, allowing for easy application in dyeing processes. However, like many azo dyes, Direct Black 38 can raise environmental and health concerns due to the potential release of aromatic amines upon degradation. Its chemical structure typically includes multiple aromatic rings, contributing to its color properties. The dye is also known for its good wash fastness, which is essential for maintaining color integrity after laundering. Safety data sheets indicate that while it is generally considered safe for use in textiles, proper handling and disposal practices should be followed to mitigate any potential risks associated with its use. Overall, Direct Black 38 is a valuable dye in the textile industry, balancing performance with the need for responsible usage.
Formula:C34H27N9O7S2·2Na
InChI:InChI=1S/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);;
InChI key:InChIKey=BPSJKGMNBUOTKY-UHFFFAOYSA-N
SMILES:[Na].O=S(=O)(O)C1=CC2=CC(=C(N=NC3=CC=C(C=C3)C=4C=CC(N=NC5=CC=C(N)C=C5N)=CC4)C(N)=C2C(O)=C1N=NC=6C=CC=CC6)S(=O)(=O)O
- Synonyms:
- C.I. Direct Black 38
- C.I. Direct Black 38, disodium salt (8CI)
- (3E)-5-amino-6-[(E)-{4'-[(E)-(2,4-diaminophenyl)diazenyl]biphenyl-4-yl}diazenyl]-4-oxo-3-(phenylhydrazono)-3,4-dihydronaphthalene-2,7-disulfonic acid
- C.I. Direct Black 38
- disodium (3Z)-5-amino-6-[(E)-{4'-[(E)-(2,4-diaminophenyl)diazenyl]biphenyl-4-yl}diazenyl]-4-oxo-3-(phenylhydrazono)-3,4-dihydronaphthalene-2,7-disulfonate
- Chlorazol Black E
- C.I. Direct Black 38, disodium salt
- C.I. Direct Black 38, disodium salt
- Azo black
- 2,7-Naphthalenedisulfonic acid, 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)
- See more synonyms
- 2,7-Naphthalenedisulfonic acid, 4-amino-3-[[4′-[(2,4-diaminophenyl)azo][1,1′-biphenyl]-4-yl]azo]-5-hydroxy-6-(phenylazo)-, disodium salt
- C.I. 30235
- disodium (3E)-5-amino-6-[(E)-{4'-[(E)-(2,4-diaminophenyl)diazenyl]biphenyl-4-yl}diazenyl]-4-oxo-3-(phenylhydrazono)-3,4-dihydronaphthalene-2,7-disulfonate
