product name: Gromwell Pigment
product description:
Gromwell Pigment is obtained through an extraction, refining processes from high quality Gromwell root which cultivated in the northwest of China. It is a red purple resinoid liquid. It dissolves in oil and alkaline solution. Its color is affected by various pH values: red in acid, red purple in neutral, blue in alkaline. It has excellent stability, high heat and light resistant, superior coloring strength. It is widely used in food, pharmaceutical, cosmetic and other industries.
|
Item |
Specification |
|
Color unit |
50~150 |
|
PH |
≤5.0 |
|
Residual organic solvents |
≤25mg/kg |
