SIDS Initial Assessment Report
Identification of the Substance
CAS Number: IUPAC Name: M o l e c u l a r F o r m u l a :
3 CH3 OH 79-50-5 2(3H)-Furanone, dihydro-3-hydroxy-4,4-dimethyl C6-H10-O
Molecular Weight: Synonyms:
130.14 DL-Lactone, dl-alpha-Hydroxy-beta,beta-dimethyl-gamma-butyrolactone, alpha-Oxy-beta,beta-dimethyl-gamma-butyrolactone, Dihydro-3-hydroxy-4H-dimethyl-2(3H)-furanone, RS-Dihydro-3-hydroxy-4,4-dimethyl-2(3H)-furanone, (RS)-Pantolactone, (±)-Pantolactone, Pantothenic lactone, DL-Pantolactone, dl-Pantoyllactone
DL-Lactone is a racemic mixture of D-Pantolactone [(3R)-dihydro-3-hydroxy-4,4-dimethyl-2(3H)- furanone, CAS 599-04-2] and L-Pantolactone [(3S)-dihydro-3-hydroxy-4,4-dimethyl-2(3H)- furanone, CAS 5405-40-3].
The product specification indicates that the test substance contains a minimum of 98% DL-lactone, 0-2% 2,4-dihydroxy-3,3-dimethyl butyric acid and 0-0.5% water.