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: NC=1C2=C(C=C(S(=O)(=O)O)C1N=NC3=CC=C(C=C3)C4=CC=C(N=NC5=C(N)C=C(N)C=C5)C=C4)C=C(S(=O)(=O)O)C(N=NC6=CC=CC=C6)=C2O.[Na]

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)
• 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

Chlorazol Black E

CAS: 1937-37-7

Formula: C₃₄H₂₅N₉Na₂O₇S₂

Color and Shape: Black powder to crystal

Molecular weight: 781.73

Ref: 3B-C0533

4-Amino-3-((4'-((2,4-diaminophenyl)diazenyl)-[1,1'-biphenyl]-4-yl)diazenyl)-5-hydroxy-6-(phenyldiazenyl)naphthalene-2,7-disulfonic acid, sodium salt

CAS: 1937-37-7

Formula: C₃₄H₂₇N₉NaO₇S₂

Purity: 99%

Color and Shape: Solid

Molecular weight: 760.7541

Ref: IN-DA0039UV

Chlorazol Black E

CAS: 1937-37-7

Chlorazol Black E

Purity: ≥95%

Ref: 54-OR1077981

Direct Black 38

CAS: 1937-37-7

Direct Black 38 (Chlorazol Black E) is a black azo dye that is genotoxic and induces unplanned DNA synthesis in rat liver and bone marrow micronuclei.

Formula: C₃₄H₂₅N₉Na₂O₇S₂

Purity: 98%

Color and Shape: Grey-Black Powder Physical Description Gray-Black Microcrystals Or Black Powder (Ntp 1992)

Molecular weight: 781.73

Ref: TM-T15135

Chlorazol Black (C.I. 30235)

CAS: 1937-37-7

Formula: C₃₄H₂₅N₉Na₂O₇S₂

Color and Shape: Dark brown or black powder

Molecular weight: 781.73

Ref: 7W-GT4928

Direct Black 38

Controlled Product

CAS: 1937-37-7

Formula: C₃₄H₂₅N₉O₇S₂Na

Color and Shape: Neat

Molecular weight: 781.73

Ref: 04-C12965000

Direct Black 38 100 µg/mL in Acetonitrile:Methanol

Controlled Product

CAS: 1937-37-7

Formula: C₃₄H₂₅N₉O₇S₂Na

Color and Shape: Single Solution

Molecular weight: 781.73

Ref: 04-A12965000MC-100

Chlorozol Black E (Technical Grade)

Controlled Product

CAS: 1937-37-7

Formula: C₃₄H₂₅N₉O₇S₂·2Na

Color and Shape: Neat

Molecular weight: 781.73

Ref: TR-C427965

Direct black 38

CAS: 1937-37-7

Direct Black 38 (DB38) is a carbonate pigment with the chemical formula of Na2CO3. It has been used as a black pigment in paints, textiles, and plastics. DB38 has been shown to be genotoxic, meaning that it can cause mutations in cells by interacting with DNA. DB38 has also been shown to be toxic to animals and humans when ingested or inhaled at high concentrations. DB38 is not mutagenic, meaning that it does not cause genetic changes in cells or organisms. The toxicity of DB38 is dose-dependent: the higher the concentration of DB38, the more toxic it becomes.

Formula: C₃₄H₂₇N₉O₇S₂·2Na

Purity: Min. 95%

Color and Shape: Brown Powder

Molecular weight: 783.75 g/mol

Ref: 3D-FD32915