D-异抗坏血酸

CAS：6381-77-7
新葡亰式：C6H8O6·Na
新葡亰量：198.10
 
中文名称：
D-异抗坏血酸
异抗坏血酸
异维生素C
 
英文名称：
d-erythro-hex-2-enonic acid gamma-lactone monosodium salt
3-keto-d-gulofuranolactose
 
性质描述： 白色至浅黄色app体或app性粉末。无臭，味酸。光线照射下逐渐发黑。干燥状态下，在空气中相当稳定。但在溶液中并在空气存在下迅速变质。于164～172℃熔化并分解。本品系抗坏血酸的异构体，化学性质类似于抗坏血酸，但几无抗坏血酸的生理活性作用(仅约1/20)。抗氧化性较抗坏血酸佳，价格亦较廉，但耐热性差。有强还原性，遇光则缓慢着色并分解。重金属离子会促进其分解。

　　极易溶于水(40g/100m1)。溶于乙醇(5g/100ml)。难溶于甘油。不溶于乙醚和苯。

 

D-异抗坏血酸安全技术说明书
Product Identification
【Product Name】2,3-Didehydro-D-erythro-hexono-1,4-lactone
【Synonyms】Isovitamin C
【CAS】89-65-6
【Formula】C6H8O6
【Molecular Weight】176.13
【EINECS】201-928-0
【RTECS】KF3015000
【RTECS Class】Mutagen
【Merck】12,5141
【Beilstein/Gmelin】84271
【Beilstein Reference】5-18-05-00026

Physical and Chemical Properties
【Appearance】Shiny granular crystals from water or dioxane.
【Solubility in water】100 g/L
【Melting Point】174℃
【Boiling Point】425℃
【Density】1.654 g/cm3
【pKa/pKb】4.13 (pKa)
【Partition Coefficient】-1.64
【Usage】Antioxidant especially in brewing industry, reducing agent in photography.

First Aid Measures
【Ingestion】Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and title1=, rinse mouth and drink 2-4 cupfuls of milk or water.
【Inhalation】Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
【Skin】Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
【Eyes】Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Handling and Storage
【Storage】Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
【Handling】Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation.

Hazards Identification
【Inhalation】May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.
【Skin】May cause skin irritation.
【Eyes】May cause eye irritation.
【Ingestion】May cause irritation of the digestive tract. The toxicological properties of this substance have not been fully investigated.

Exposure Controls/Personal Protection
【Personal Protection】
Eyes: Wear appropriate protective eyeglasses or chemical safety ggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166.
Skin: Wear appropriate protective gloves to prevent skin exposure.
Clothing: Wear appropriate protective clothing to prevent skin exposure.
【Respirators】A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
【Exposure Effects】Laboratory experiments have resulted in mutagenic effects. None
【Poison Class】-

Fire Fighting Measures
【Flash Point】169℃
【Fire Fighting】Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Dusts at sufficient concentrations can form explosive mixtures with air. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Containers may explode in the heat of a fire. Extinguishing media: Use agent most appropriate to extinguish fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.

Accidental Release Measures
【Small spills/leaks】Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation.

Stability and Reactivity
【Stability】Stable under normal temperatures and pressures.
【Incompatibilities】Strong oxidizing agents, strong bases, chemically active metals, aluminum, copper, magnesium, zinc.
【Decomposition】Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

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