ANNEXDETERMINATION OF DICHLOROMETHANE AND 1,1,1-TRICHLOROETHANE
IDENTIFICATION AND DETERMINATION OF MERCAPTOACETIC ACID IN HAIR-WAVING, HAIR-STRAIGHTENING AND DEPILATORY PRODUCTS
4.IDENTIFICATION
4.2.Identification by thin-layer chromatography
4.2.1.Reagents
4.2.1.3.
2-mercaptopropionic acid (thiolactic acid), 95 % minimum purity assayed by iodometry.