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CAS RN: 633-96-5 | Product Number: G0158

Acid Orange 7

Purity: >97.0%(HPLC)
  • Gold Orange
  • p-(2-Hydroxy-1-naphthylazo)benzenesulfonic Acid Sodium Salt
  • Orange II
  • Tropaeolin OOO-2
7   ≥20 
1   16  
6   4  

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Product Number G0158
Purity / Analysis Method >97.0%(HPLC)
Molecular Formula / Molecular Weight C__1__6H__1__1N__2NaO__4S = 350.32  
Physical State (20 deg.C) Solid
CAS RN 633-96-5
Reaxys Registry Number 8177125
PubChem Substance ID 87570353
Merck Index (14) 6858
Colour Index 15510
MDL Number


Appearance Orange to Brown to Dark red powder to crystal
Purity(HPLC) min. 97.0 area%
Lambda max. 482.0 to 486.0 nm(0.02mol/L AcONH4 sol.)
Absorbance(E1%1cm) min. 500(0.02mol/L AcONH4 sol., 482.0 to 486.0 nm)
Properties (reference)
Melting Point 164 °C
Maximum Absorption Wavelength 484(0.02mol/L AcONH4 sol.) nm
Solubility in water Soluble
Solubility (soluble in) Alcohol
Pictogram Pictogram
Signal Word Warning
Hazard Statements H315 : Causes skin irritation.
H319 : Causes serious eye irritation.
Precautionary Statements P264 : Wash skin thoroughly after handling.
P280 : Wear protective gloves/ eye protection/ face protection.
P302 + P352 : IF ON SKIN: Wash with plenty of water.
P337 + P313 : If eye irritation persists: Get medical advice/ attention.
P362 + P364 : Take off contaminated clothing and wash it before reuse.
P332 + P313 : If skin irritation occurs: Get medical advice/ attention.
Related Laws: / Compliance with laws, Regulations
Enzyme Commission 211-199-0
RTECS# DB7084000
Transport Information:
HS Number 2927000090
PubMed Literature

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