Sodium erythorbate 6381-77-7

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Sodium erythorbate Basic information Product Name: Sodium erythorbate Synonyms: 3-keto-d-gulofuranolactose;erbitn;eribaten;isoascorbic;isona;mercate20;D-erythro-Hex-2-enonic acid, .gamma.-lactone, sodium salt (1:1);2,3-Didehydro-3-O-sodio-D-erythro-hexono-1,4-lactone CAS: 6381-77-7 MF: C6H9NaO6 MW: 200.12 EINECS: 228-973-9 Product Categories: Inhibitors;Food additive;Biochemistry;Vitamin Derivatives;Vitamins;Antioxidant;6381-77-7 Mol File: 6381-77-7.mol Sodium erythorbate Chemical Properties Melting point  154-164°C (decomposes) alpha  97 º (c=1,DMF) density  1.702[at 20℃] vapor pressure  0Pa at 25℃ refractive index  97 ° (C=10, H2O) storage temp.  Sealed in dry,Room Temperature solubility  Soluble in DMSO form  solid color  Light yellow to yellow Odor at 100.00?%. odorless Water Solubility  146g/L at 20℃ InChI InChI=1/C6H8O6.Na.H/c7-1-2(8)5-3(9)4(10)6(11)12-5;;/h2,5,7-10H,1H2;;/t2-,5-;;/s3 InChIKey RALCFXKKGFGHCA-DJDVHRGRNA-N SMILES [C@@H]([C@@]1([H])OC(=O)C(O)=C1O)(O)CO.[NaH] |&1:0,1,r| LogP -3.29 CAS DataBase Reference 6381-77-7(CAS DataBase Reference) EPA Substance Registry System Sodium erythorbate (6381-77-7) Safety Information RTECS  MP8910000 HS Code  2918.29.7500 Hazardous Substances Data 6381-77-7(Hazardous Substances Data) MSDS Information Sodium erythorbate Usage And Synthesis Chemical Properties Sodium erythorbate is a white to yellow-white crystalline powder or granules that are slightly salty and almost odorless. It is stable in the dry state but can deteriorate when exposed to air, trace metals, heat and light in solution. The compound has a melting point above 200℃ (decomposition) and is soluble in water (17g/100m1) but almost insoluble in ethanol. The pH of a 2% aqueous solution ranges from 5.5 to 8.0. Uses Sodium Erythorbate is an antioxidant that is the sodium salt of erythorbic acid. in the dry crystal state it is nonreactive, but in water solution it readily reacts with atmospheric oxygen and other oxidizing agents, a property that makes it valuable as an antioxidant. during preparation, a minimal amount of air should be incorporated and it should be stored at a cool temperature. it has a solubility of 15 g in 100 ml of water at 25°c. on a comparative basis, 1.09 parts of sodium erythorbate are equivalent to 1 part of sodium ascorbate; 1.23 parts of sodium erythorbate are equivalent to 1 part erythorbic acid. it functions to control oxidative color and flavor deterioration in a variety of foods. in meat curing, it controls and accelerates the nitrite curing reaction and maintains the color brightness. it is used in frankfurters, bologna, and cured meats and is occasionally used in beverages, baked goods, and potato salad. it is also termed sodium isoascorbate. Preparation It is produced through using D-glucose fermentation of Pseudomonas fluorescens Kl005 or Arthrobacter globiformis K1022 to produce 2-keto-D-gluconic acid (or calcium salt), followed by being esterified, transformed and refined. The composition of the fermentation medium is: glucose: 18; yeast extract 0.3; K2HPO4 ? 3H2O: 0.05; KH2PO4: 0.05; MgSO4 ? 7H2O: 0.025,;CaCO:34.5. The fermentation temperature is controlled at 30~35 ℃, the fermentation period is 30h, and the fermentation conversion ratio (%) is 79.9%. The fermentation broth is supplemented with sulfate and activated carbon for acidification and decoloring, followed by pressurized filtrate to obtain the clean liquid with a yield of 96.6%. The purified fermentation broth was concentrated by decompression, and methanol and sulfuric acid were added for refluxed esterification of 5h, followed by frozen and centrifuged filtering to obtain methyl ester with a yield of 82.1%. The methyl ester was transformed with basic methanol solution under refluxing conditions, and the product was further frozen and crystallized to dryness to obtain the crude product of D-isoascorbic acid. The conversion yield was 87.3%, and it was dissolved in hot water and decolorized with activated carbon. The filtrate is pressurized filtrated and the supernatant liquid is frozen, crystallized, centrifugalized, washed and vacuum dried to obtain finished product. The mother liquid is recovered and the yield is 88.0%. General Description Almost odorless fluffy, white to off-white crystalline powder. Used as an antioxidant and preservative.

First aid measures

General advice Consult a physician. Show this material safety data sheet to the doctor in attendance. If inhaled If breathed in, move person into fresh air. If not breathing, give artificial respiration. Consult a physician. In case of skin contact Wash off with soap and plenty of water. Consult a physician. In case of eye contact Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician. If swallowed Never give anything by mouth to an unconscious person. Rinse mouth with water. Consult a physician.

Firefighting measures

Suitable extinguishing media Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide. Special hazards arising from the substance or mixture Carbon oxides Nitrogen oxides (NOx) Advice for firefighters Wear self-contained breathing apparatus for firefighting if necessary.



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