Pigments & Colorants
REACH
Orange Oil
CAS Number
2646-17-5
EC Number
220-162-8
What is Orange Oil?
Orange Oil SS (CAS 2646-17-5), also known as Oil Orange SS, is an oil-soluble azo dye used to impart orange coloration to non-aqueous substrates and polymer matrices.
Where is Orange Oil used?
- Plastics and polymer processing: coloring polyethylene
- Polystyrene and PVC compounds: uniform dispersion in the melt phase
- Printing inks: solvent-based formulations for packaging
- Textile and leather finishing: solvent-based dyeing for consistent surface coloration
- Paper coatings and specialty paper rely on this dye where oil-based carrier systems are part of the coating formulation.
Good to know: Buyers should confirm lot-specific spectrophotometric data and verify solvent compatibility when qualifying for a new formulation.
Commercial specifications
- Color strength and purity specifications typically confirmed against standard reference lots
Other Names (Synonyms)
Oil orange ss|1-[(2-methylphenyl)diazenyl]naphthalen-2-ol|Orange ot
What are the physical properties of Orange Oil?
Melting Point 131 °C
Boiling Point 405.56°C (rough estimate)
Density 1.0823 (rough estimate)
Appearance red needles or powder
Color Red to Dark Red
Form neat
Water Solubility 26.23ug/L(room temperature)
Refractive Index 1.5500 (estimate)
How is Orange Oil classified and handled safely? Learn More
Warning
GHS08· Health Hazard
Hazard Statements
H341 Suspected of causing genetic defects [Warning Germ cell mutagenicity]
H351 Suspected of causing cancer [Warning Carcinogenicity]
Which trade and regulatory codes apply to Orange Oil?
HS Code 2927.00.5000
WGK (Germany) 3