Appearance: colorless transparent liquid 

Content:  ≥ 99.5% 

Refractive index (nD20): 1.405 - 1.407 

Acid value (mgKOH/g): ≤0.05 

Water content: ≤ 0.2% 

Chroma: ≤ 20 

Specific gravity: 1.068-1.073