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A92902
Acide L-ascorbique
99%
Synonyme(s) :
Acide L-thréoascorbique, Facteur anti-scorbut, Vitamine C
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A propos de cet article
Formule linéaire :
C6H8O6
Numéro CAS:
Poids moléculaire :
176.12
UNSPSC Code:
12352205
NACRES:
NA.21
PubChem Substance ID:
EC Number:
200-066-2
Beilstein/REAXYS Number:
84272
MDL number:
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Service technique
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Laissez-nous vous aiderbiological source
synthetic
Quality Segment
assay
99%
form
powder
optical activity
[α]25/D 19.0 to 23.0°, c = 10% in H2O
color
white to off-white
pH
1.0-2.5 (25 °C, 176 g/L in water)
mp
190-194 °C (dec.)
solubility
water: soluble 176 g/L at 20 °C
SMILES string
OC([C@]([C@@H](O)CO)([H])O1)=C(O)C1=O
InChI
1S/C6H8O6/c7-1-2(8)5-3(9)4(10)6(11)12-5/h2,5,7-10H,1H2/t2-,5+/m0/s1
InChI key
CIWBSHSKHKDKBQ-JLAZNSOCSA-N
Gene Information
human ... SLC23A2(9962)
General description
L-ascorbic acid is used as a food additive, browning inhibitor, flavor stabilizer, dough modifier and color stabilizer. Deficiency of ascorbic acid is associated with scurvy. L-ascorbic acid stimulates immune response and is implicated in the synthesis of collagen, carnitine and neurotransmitters.
Application
L-Ascorbic acid has been used:
- as a component in osteogenic differentiation medium
- in MesenCult medium for the differentiation of bone marrow stromal cells
- as a standard for vitamin C assay
- to prevent trihalomethanes formation potential (THMFP)
Biochem/physiol Actions
Ascorbic Acid, also known as Vitamin C, is a six-carbon lactone produced by plants and some animal species but not by humans and other primates. Ascorbic acid functions as an enzymatic cofactor for multiple enzymes, serving as an electron donor for monooxygenases and dioxygenases. Ascorbic acid also functions as a powerful antioxidant, particularly in regards to reactive oxygen species.
L-Ascorbic acid (L-AA) is a widely available and water-soluble compound. L-AA has an ability to inhibit the corrosion of mild steel.
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Cet article | |||
|---|---|---|---|
| description 99% | description reagent grade, crystalline | description analytical standard | description FCC, FG |
| biological source synthetic | biological source synthetic | biological source - | biological source synthetic |
| assay 99% | assay ≥98% ( with iodine, titration) | assay - | assay 99.0-100.5% (iodometric) |
| form powder | form crystalline | form solid | form powder or crystals, crystalline |
| solubility water: soluble 176 g/L at 20 °C | solubility water: soluble 50 mg/mL | solubility water: soluble 176 g/L at 20 °C | solubility water: soluble 176 g/L at 20 °C |
| Quality Level 200 | Quality Level 200 | Quality Level 100 | Quality Level 300 |
| color white to off-white | color white to slightly yellow | color - | color white |
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Classe de stockage
11 - Combustible Solids
Que se passe-t-il ?
WGK 1
Point d'éclair (°F)
Not applicable
Point d'éclair (°C)
Not applicable
EPI (équipement de protection individuelle)
Eyeshields, Gloves, type N95 (US)
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Is the A92902 L-ascorbic acid référence of pharmaceutical grade ?
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How can I determine the shelf life / expiration / retest date of this product?
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If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdfHelpful?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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What is the validity period of this reagent?
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This product is not assigned an expiration date or recommended retest date. Customers should routinely inspect products with no expiration date or recommended retest date to ensure they perform as expected. These products are also subject to a one-year warranty from the date of shipment.
For more information, you may access the "Product Dating Information" document under "ADDITIONAL USEFUL DOCUMENTS ABOUT OUR PRODUCTS" at the bottom of the Quality Services page with this link: https://www.sigmaaldrich.com/life-science/quality-and-regulatory-management/quality-services.
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