19132-06-0
(2S,3S)-(+)-2,3-Butanediol
CAS: 19132-06-0
Molecular Formula: C4H10O2
19132-06-0 - Names and Identifiers
| Name | (2S,3S)-(+)-2,3-Butanediol |
| Synonyms | L(+)-2,3-BUTANEDIOL (S,S)-2,3-BUTANEDIOL (3S)-butane-2,3-diol (2S,3S)-2,3-BUTANEDIOL (2S,3S)-butane-2,3-diol (S,S)-(+)-2,3-BUTANEDIOL (S-(R,R))-butane-2,3-diol (2S,3S)-(+)2,3-Butanediol (2S,3S)-(+)-2,3-BUTANEDIOL (2S,3S)-(+)-2,3-Butanediol 2,3-BUTANEDIOL, [S-(R*,R*)]- (S,S)-(+)-2,3-DIHYDROXYBUTANE |
| CAS | 19132-06-0 |
| EINECS | 208-173-6 |
| InChI | InChI=1/C4H10O2/c1-3(5)4(2)6/h3-6H,1-2H3/t3-,4?/m0/s1 |
19132-06-0 - Physico-chemical Properties
| Molecular Formula | C4H10O2 |
| Molar Mass | 90.12 |
| Density | 0.987 g/mL at 25 °C (lit.) |
| Melting Point | 20°C |
| Boling Point | 179-182 °C (lit.) |
| Specific Rotation(α) | 13 º (c=neat) |
| Flash Point | 185°F |
| Water Solubility | soluble |
| Solubility | Chloroform (Slightly), Methanol (Slightly) |
| Vapor Presure | 0.26mmHg at 25°C |
| Appearance | Oily Liquid |
| Specific Gravity | 0.987 |
| Color | Slightly yellow |
| BRN | 1718899 |
| pKa | 14.67±0.20(Predicted) |
| PH | 9-10 (500g/l, H2O, 20℃) |
| Storage Condition | 2-8°C |
| Stability | hygroscopic |
| Explosive Limit | 3.1-11.4%(V) |
| Refractive Index | n20/D 1.433 |
| Physical and Chemical Properties | Specific Rotation 13 ° (c = neat) boiling point 179-182°C(lit.) density 0.992g/mL at 20°C(lit.) refractive index n20/D 1.433 flash point 185 ° F storage conditions 2-8°C water solubility soluble |
19132-06-0 - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Safety Description | 24/25 - Avoid contact with skin and eyes. |
| UN IDs | NA 1993 / PGIII |
| WGK Germany | 3 |
| HS Code | 29053995 |
19132-06-0 - Reference
| Reference Show more | 1. [IF=3.174] Shaoqu Xie et al."Salting-out of bio-based 2,3-butanediol from aqueous solutions."J Chem Technol Biot. 2017 Jan;92(1):122-132 |
19132-06-0 - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| application | (2S,3S)-( )-2, 3-butanediol is an optically pure 2, 3-butanediol (2,3-bd). 2, 3-butanediol is an important o-diol with three stereoisomers: meso-2, 3-butanediol, (2R,3R)-2, 3-butanediol and (2S,3S)-2, 3-butanediol. As an important platform chemical, 2,3-bd can be used to produce valuable derivatives such as methyl ethyl ketone and 1,3-butadiene. Optically active isomers can be used as antifreeze. Optically pure 2,3-bd also serves as a good building block for asymmetric synthesis of chiral compounds containing two ortho stereocenters. |
| preparation | (1) take 6.06g of the solution containing ketone reductase obtained in the above step 1 and 20mL of phosphoric acid buffer salt solution with a concentration of 0.01mol/L into a clean 250mL single-mouth flask filled with magnets, and place the single-mouth flask in a water bath at 20 ℃, the solution in the single flask was stirred and mixed at a speed of 400rpm to obtain a mixed solution. (2) In the stirring process, keep the water bath temperature unchanged, and add 0.202g of nicotinamide adenine dinucleotide, 100mL of isopropanol and 20.2g of 2, 3-butanedione to the mixture to carry out a closed reaction to obtain the reaction solution. (3) The above reaction liquid is subjected to vacuum suction filtration to obtain a light yellow filtrate, and then the filtrate is placed at 45°C and 0.08MPa for rotary evaporation treatment, until almost no liquid flows out to obtain an extract. (4) Put the above extract in a water bath at 50 ℃, and use a rectification column and a condenser tube to raise the temperature to 70 ℃ for rectification separation to obtain (2S,3S)-( )-2, 3-butanediol. |
Last Update：2024-04-09 15:16:48
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