Density 0.810-0.820

Refractive index nD 1.380-1.395

Viscosity, Pa.s 0.005-0.020

Basicity 162.0-198.0

UV absorbance≤0.20

Drying loss, %≤4.0

Residue on ignition, %≤0.2

Heavy metal, %≤10ppm

As, %≤0.0002

Appearance: Offwhite or light yellow solid strips. Slight odor.

Solubility: Insoluble in water; soluble in polar organic solvents.