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Chemical structure of Direct Black 38

GC38068

Direct Black 38

Also known as disodium;4-amino-3-[[4-[4-[(2,4-diaminophenyl)diazenyl]phenyl]phenyl]diazenyl]-5-hydroxy-6-phenyldiazenylnaphthalene-2,7-disulfonate

Direct Black 38 (Chlorazol Black E) is an azo dye

ChemicalCAS1937-37-7MW781.73FormulaC34H25N9Na2O7S2
CAS number
1937-37-7
Molecular weight
781.73
Formula
C34H25N9Na2O7S2
Solubility
Water： 5 mg/mL (6·40 mM)
InChIKey
XRPLBRIHZGVJIC-UHFFFAOYSA-L
Catalogue number
GC38068
Brand
GLPBIO
Computed properties PubChem CID 5284349 · TPSA 304 Ų · H-bond donors 4 · H-bond acceptors 16
TPSA
304 Ų
H-bond donors
4
H-bond acceptors
16
Rotatable bonds
7
Heavy atoms
54

SMILES C1=CC=C(C=C1)N=NC2=C(C3=C(C(=C(C=C3C=C2S(=O)(=O)[O-])S(=O)(=O)[O-])N=NC4=CC=C(C=C4)C5=CC=C(C=C5)N=NC6=C(C=C(C=C6)N)N)N)O.[Na+].[Na+]

Computed descriptors from PubChem (CID 5284349), public domain. Identity cross-checked against the supplier's molecular formula and weight — verify before use.

Ordering in Israel

Lead time
Ships from the manufacturer to your lab in 8–14 business days; customs and cold chain handled by LABO Scientific.
Pricing
Quoted in ILS, excl. VAT. Add the item to your quote and we confirm the final price, usually the same business day.
Documents
Lot certificate of analysis and manufacturer SDS are emailed with your order confirmation.
Who we serve
Universities, hospitals and biotech companies across Israel. Research use only — not for diagnostic or therapeutic use.