L-PGA

Application:Oxidized proline, also known as L-pyroglutamic acid. Relative molecular weight 129.12. Melting point 162~163 ℃. Insoluble in ether, slightly soluble in ethyl acetate, soluble in water (40 at 25 ℃), ethanol, acetone, and glacial acetic acid. Specific rotation -11.9 ° (c=2, H2O). Its sodium salt can be used as a moisturizing agent in cosmetics, and its moisturizing effect is superior to glycerol and sorbitol. It is non-toxic and non irritating, and is used in skincare and hair care cosmetics; This product has an inhibitory effect on tyrosine oxidase, can prevent the deposition of melanin, and has a whitening effect on the skin; It has a softening effect on keratin and can be used in nail cosmetics; It can also be used as a surfactant for detergents; Chemical reagents for the resolution of racemic amines; Organic intermediates.

Specification:

ITEMS	SPECIFICATION
APPEARANCE	OFF-WHITE CRYSTALLINE POWDER
SPECIFIC ROTATION(A)D20(C=2,H₂O)	-11.0°~ -12.0°
CHLORIDE(CL)（%）	≤0.02
AMMONIUM(NH₄)（%）	≤0.02
SULFATE(SO₄)（%）	≤0.05
HEAVY METALS(PB)（%）	≤10PPM
IRON(FE)	≤20PPM
ARSENIC(As₂O₃)	≤1PPM
LOSS ON DRYING（%）	≤0.5
MELTING POINT(℃)	158℃-163℃
RESIDUE ON IGNITION（%）	≤0.2
ASSAY（%）	98.0-101.0