| Common Name | Erythorbic acid |
| CAS Number | 89-65-6 |
| Molecular Weight | 176.124 |
| Density | 2.0±0.1 g/cm3 |
| Boiling Point | 552.7±50.0 °C at 760 mmHg |
| Molecular Formula | C6H8O6 |
| Melting Point | 167-172ºC |
| MSDS | Chinese USA |
| Flash Point | 238.2±23.6 °C |
| Symbol | GHS07 |
| Signal Word | Warning |
| Density | 2.0±0.1 g/cm3 |
| Boiling Point | 552.7±50.0 °C at 760 mmHg |
| Melting Point | 167-172ºC |
| Molecular Formula | C6H8O6 |
| Molecular Weight | 176.124 |
| Flash Point | 238.2±23.6 °C |
| Exact Mass | 176.032089 |
| PSA | 107.22000 |
| LogP | -2.41 |
| Vapour Pressure | 0.0±3.4 mmHg at 25°C |
| Index of Refraction | 1.711 |
| Symbol | GHS07 |
| Signal Word | Warning |
| Hazard Statements | H315-H319-H335 |
| Precautionary Statements | P261-P305 + P351 + P338 |
| Personal Protective Equipment | dust mask type N95 (US);Eyeshields;Gloves |
| Hazard Codes | Xi: Irritant; |
| Risk Phrases | R36/37/38 |
| Safety Phrases | S24/25 |
| RIDADR | NONH for all modes of transport |
| WGK Germany | 2 |
| RTECS | KF3015000 |
| HS Code | 2932209090 |
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1.What is Erythorbic Acid
Erythorbic Acid is White to light yellow crystal or crystalline powder. Odorless, sour taste. Gradually blackens under light irradiation. Fairly stable in air in dry state. However, it deteriorates rapidly in solution and in the presence of air. Melts and decomposes at 164-172°C. This product is an isomer of ascorbic acid, the chemical properties are similar to ascorbic acid, but a few do not have the physiological active effect of ascorbic acid (only about 1/20). The antioxidant property is better than ascorbic acid, the price is cheaper, but the heat resistance is poor. It has strong reducing property, slowly coloring and decomposing when exposed to light. Heavy metal ions will promote its decomposition. Very soluble in water (40g/100m1). Soluble in ethanol (5g/100ml). Difficult to dissolve in glycerol. Insoluble in ether and benzene.
2.How is Erythorbic Acid produced?
1. It is produced by fermenting D-glucose with Pseudomonas fluorescens Kl005 or Arthrobacter globulus K1022 to produce 2-keto-D-gluconic acid (or calcium salt), and then it is esterified, transformed and refined. Fermentation medium composition (%): glucose 18, yeast paste 0.3, K2HPO4-3H2O 0.05, KH2PO40.05, MgSO4-7H2O0.025, CaC034.5; the fermentation temperature is controlled at 30-35 ℃, the fermentation cycle is 30h, the fermentation conversion rate is 79.9%. Fermentation liquid plus sulfuric acid, activated carbon to acidification and decolorization, and then plate and frame pressure filtration to get clear liquid, yield 96.6%; purified fermentation liquid concentrated under reduced pressure, add methanol, sulfuric acid reflux esterification 5h, freeze crystallization, centrifugal dumping filtration to get methyl ester, esterification yield 82.1%. Methyl ester with methanol, alkaline methanol solution under reflux conditions for conversion, freezing crystallization, drying of D-isoascorbic acid sodium crude, conversion yield 87.3%; will be dissolved in hot water and then add activated carbon decolorization, and insulation and pressure filtration, the clear liquid by freeze crystallization, centrifugal dumping filtration, washing, vacuum drying of the finished product, the mother liquor recovery, refining yield of 88.0%. 2. Glucose as raw material, after fermentation, then by esterification, transposition refining system. 3. Produced by reacting isoascorbic acid with sodium hydroxide or sodium carbonate.
3.How is Erythorbic Acid stored and distributed?
Store under dry inert gas, keep container tightly closed, store in a cool, dry place Packed in galvanized iron drums. Store in a cool, ventilated place. The storage should be dedicated and not mixed with other items. Pay attention to fire prevention. Polymerization inhibitor should be added before storage and transportation. Before transportation, check whether the packing container is complete and sealed, and make sure the container is not leaking, collapsing, falling or damaged during transportation. Strictly prohibit mixing and transporting with oxidizing agents, acids, alkalis, edible chemicals and so on. The transport vehicle and ship must be thoroughly cleaned and sterilized, otherwise it is not allowed to ship other items. When transported by ship, the fitting position should be far away from bedrooms, kitchens, and isolated from the cabin, power supply, fire source and other parts. Road transportation should follow the prescribed route.
4.What is Erythorbic Acid used for?
Isoascorbic acid and its sodium salt have a wide range of uses, and have been used as food antioxidants to prevent browning of fish, meat, vegetables, fruit juices, etc. The product is a new type of food antioxidant, preservative, and freshness-keeping agent. This product is a new type of food antioxidant, preservative and freshness-keeping agent, which can effectively reduce the oxidation of food, prevent the fading of its color, aroma and taste, and also inhibit the formation of ammonium nitrite, a carcinogenic substance in food. At present, the product has been widely used in meat, vegetables, fruits, alcohol, beverages, canned food, tea and other foods.
