Detail of "4254-14-2"

CAS Number:
4254-14-2
Name:
(R)-(-)-1,2-Propanediol
Molecular Structure:
Formula:
C₃H₈O₂
Molecular Weight:
76.09
Synonyms:
(R)-(-)-1,2-Propyleneglycol;(R)-(-)-Propylene glycol;(R)-(-)-Propylene glycerol;
Density:
1.036 g/cm³
Melting Point:
-57 °C
Boiling Point:
184.8 °C at 760 mmHg
Flash Point:
107.2 °C
Appearance:
colorless to light yellow liquid
Hazard Symbols:
F, Xn
Risk Codes:
20-65-15-10
Safety:
24/25-43-7/8 Details

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1,2-Propanediol, especially D(-)-1,2-propanediol by fermentation: 1,2-Propanediol, especially D(-)-1,2-propanediol by fermentation. (Maizena G.m.b.H., Fed. Rep. Ger.). Ger. Offen. DE 3336051 A1 25 Apr 1985, 10 pp. (German). (Germany). CODEN: GWXXBX. CLASS: ICM: C12P007-18. APPLICATION: DE 83-3336051 4 Oct 1983. DOCUMENT TYPE: Patent CA Section: 16 (Fermentation and Bioindustrial Chemistry) D-(-)-1,2-Propanediol [4254-14-2] is produced by fermn. with Clostridium sphenoides under phosphate-limited conditions. Thus, C. sphenoides was cultured in media contg. 1.98-69.4 g glucose/L and (NH4)2SO4 1.3, NaCl 0.6, CaCl2.H2O 0.06, MgSO4.7H2O 0.2, ZnSO4.7H2O 0.02, KCl 0.5 g, and yeast ext. soln. 20 mL/L in NaHCO3 or HEPES or MES buffer under a H2 or N2 or N2/CO2 atm. The yields of 1,2-propanediol [57-55-6] were 23.2-24.5 mmol/mmol glucose consumed. The product was >90% in the D-form.

Performing electromicrobial reductions: Performing electromicrobial reductions. Simon, Helmut; Bader, Johann; Guenther, Helmut (BASF A.-G. , Fed. Rep. Ger.). Ger. Offen. DE 3226888 A1 19 Jan 1984, 14 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C25B003-04; C07C031-20; C07C055-02; C12P001-00; C12P007-02; C12P013-04; C12P033-18; C12P007-42; C12P007-00; C12P007-40; C07D267-22. APPLICATION: DE 82-3226888 17 Jul 1982. DOCUMENT TYPE: Patent CA Section: 72 (Electrochemistry) Section cross-reference(s): 16 Methods are given for carrying cut the title redns. in an O-free atm. In these redns. the microorganisms may be either aerobic or microaerophilic. Thus, methylviologen 50, EDTA 2.5 mmol, K phosphate 2.5 mmol and brewers' yeast 400 mg were suspended in 25 mL H2O and the pH adjusted to 7.0 before electrolysis at a cathode potential -790 mV. The methylviologen was reduced and then 1 mmol of Me2CO was added and the potential readjusted to -790 mV (vs. SCE). After 50 h the Me2CO was converted to (R)-1,2-propanediol [4254-14-2] which after centrifugation was sepd. by distn. This product had a rotation value of [a]D20 = -20. 4254-14-2 and 599-04-2 are just another two chemicals used in this study.7°. .