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Chemical structure of Orange I

GC76139

Orange I

Also known as sodium 4-[(4-hydroxynaphthalen-1-yl)diazenyl]benzenesulfonate

Orange I (α-Naphthol Orange) is an organic azo dye used as a food dye

ChemicalCAS523-44-4MW350.32FormulaC16H11N2NaO4S
CAS number
523-44-4
Molecular weight
350.32
Formula
C16H11N2NaO4S
Solubility
DMSO： 125 mg/mL (356·82 mM; Need ultrasonic)
InChIKey
AZLXCBPKSXFMET-UHFFFAOYSA-M
Catalogue number
GC76139
Brand
GLPBIO
Computed properties PubChem CID 135513128 · TPSA 111 Ų · H-bond donors 1 · H-bond acceptors 6
TPSA
111 Ų
H-bond donors
1
H-bond acceptors
6
Rotatable bonds
3
Heavy atoms
24

SMILES C1=CC=C2C(=C1)C(=CC=C2O)N=NC3=CC=C(C=C3)S(=O)(=O)[O-].[Na+]

Computed descriptors from PubChem (CID 135513128), 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.