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| | 2,2-Bis(hydroxymethyl)propionic acid Basic information |
| Product Name: | 2,2-Bis(hydroxymethyl)propionic acid | | Synonyms: | 2,2-Bis(hydroxymethyl)propanoic acid;2,2-BIS(HYDROXYMETHYL)PROPIONIC ACID 98%;2,2-DIMETHYLOL PROPIONIC ACID ( BIS DMPA );2,2-BIS(HYDROXYMETHYL)PROPIONIC ACID;DMPA(R);2,3-BIS(HYDROXYMETHYL)PROPIONIC ACID 4767-3-7;2,4-BIS(HYDROXYMETHYL)PROPIONIC ACID;3-Hydroxy-2-methyl-2-(hydroxymethyl)propionic acid | | CAS: | 4767-03-7 | | MF: | C5H10O4 | | MW: | 134.13 | | EINECS: | 225-306-3 | | Product Categories: | fine chemicals, specialty chemicals, intermediates, electronic chemical, organic synthesis, Organic acids;Organic acids;bc0001;4767-03-7 | | Mol File: | 4767-03-7.mol |  |
| | 2,2-Bis(hydroxymethyl)propionic acid Chemical Properties |
| Melting point | 189-191 °C(lit.) | | Boiling point | 167.23°C (rough estimate) | | density | 0.84 | | vapor density | <1 (vs air) | | refractive index | 1.4240 (estimate) | | Fp | >150°C | | storage temp. | Inert atmosphere,Room Temperature | | solubility | H2O: soluble | | form | Crystalline Powder | | pka | 4.16±0.15(Predicted) | | color | White | | PH | 2.6 (50g/l, H2O, 20℃) | | Water Solubility | soluble | | Sensitive | Hygroscopic | | Merck | 14,3253 | | BRN | 1756385 | | Stability: | Stable. Hygroscopic. | | InChI | 1S/C5H10O4/c1-5(2-6,3-7)4(8)9/h6-7H,2-3H2,1H3,(H,8,9) | | InChIKey | PTBDIHRZYDMNKB-UHFFFAOYSA-N | | SMILES | CC(CO)(CO)C(O)=O | | CAS DataBase Reference | 4767-03-7(CAS DataBase Reference) | | NIST Chemistry Reference | 2,2-Bis(hydroxymethyl)propionic acid(4767-03-7) | | EPA Substance Registry System | Dimethylolpropionic acid (4767-03-7) |
| Hazard Codes | Xi | | Risk Statements | 36/37/38-36/37 | | Safety Statements | 26-37/39 | | WGK Germany | 3 | | RTECS | UA2465265 | | F | 3-9 | | Autoignition Temperature | >300 °C | | Hazard Note | Irritant | | TSCA | TSCA listed | | HS Code | 29159000 | | Storage Class | 11 - Combustible Solids | | Hazard Classifications | Eye Irrit. 2 | | Toxicity | LD50 orally in Rabbit: > 2000 mg/kg |
| | 2,2-Bis(hydroxymethyl)propionic acid Usage And Synthesis |
| Chemical Properties | white crystalline powder | | Uses | 2,2-Bis(hydroxymethyl)propionic acid is commonly used as an AB2 monomer for the synthesis of hyperbranched (hb) polymers and dendrimers. | | Uses | In preparation of water-sol alkyl resins. | | Uses | 2,2-bis(hydroxymethyl)propionic acid (DMPA) is a versatile organic materials. it is used as water-based polyurethane chain extender, also make the polyurethane obtained from emulsifying properties, excellent stability can be made self-emulsifying aqueous polyurethane. For preparation a photosensitive resin and liquid crystal materials; for epoxy ester coatings, polyurethane elastomers and powder coatings; Preparation of magnetic recording materials and adhesives etc.. | | Definition | ChEBI: 2,2-Bis(hydroxymethyl)propionic acid is a 3-hydroxy carboxylic acid. | | Synthesis | 2,2-dihydroxypropionic acid preparation method steps are as follows:
Add 980Kg of pure water in 3000L reactor, put 16Kg of activated carbon loaded sodium hydroxide, add 1000Kg of formaldehyde, drop 300Kg of n-propanal, drop finished for 20-60 constant temperature 6-14h;
Add 10Kg of formic acid to neutralize the pH value between 6 and 7.2;
Transfer to oxidizing kettle, concentrate in oxidizing kettle under reduced pressure, recover part of unreacted formaldehyde;
Add 580Kg of hydrogen peroxide at elevated temperature, and carry out constant temperature of 60-90 for 6-10h after dropping;
Add 400Kg to 800Kg of water, and concentrate under reduced pressure;
Concentrate to water between 5—8%, cool and crystallize, centrifuge to get 2,2-dihydroxymethylpropionic acid crude product. The mother liquor was filtered for recirculation recrystallization;
Add 1000kg of water to 1000kg of crude product, warm it up to 50-60 with stirring, add a small amount of iron remover and about 5kg of activated carbon, and filter it after half an hour to remove the activated carbon. Concentrate again at atmospheric pressure to the water content between 25wt%~30wt% discharge cooling crystallization, and then centrifugation, drying and sieving and other treatments to get 2,2-dihydroxymethylpropionic acid product.
The crude mother liquor is re-concentrated and then recrystallized to extract the product again; the fine mother liquor is then concentrated, decolorized, crystallized, centrifuged and dried to recover the product again. The refined mother liquor is recycled and returned as crude mother liquor. The crude mother liquor after extracting products again is finally treated as waste water. The mother liquor after each filtration was well treated to recover 2,2-dihydroxymethylbutyric acid in the mother liquor and improve the product yield.
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| | 2,2-Bis(hydroxymethyl)propionic acid Preparation Products And Raw materials |
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