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.pdf
791725
Zitronensäure
anhydrous grade, ACS reagent grade, ≥99.5%, Redi-Dri™, free-flowing, crystals
Synonym(e):
2-Hydroxy-propane-1,2,3-tricarboxylic acid
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Produktname
Zitronensäure, anhydrous, free-flowing, Redi-Dri™, ACS reagent, ≥99.5%
InChI key
KRKNYBCHXYNGOX-UHFFFAOYSA-N
InChI
1S/C6H8O7/c7-3(8)1-6(13,5(11)12)2-4(9)10/h13H,1-2H2,(H,7,8)(H,9,10)(H,11,12)
SMILES string
OC(=O)CC(O)(CC(O)=O)C(O)=O
grade
ACS reagent
anhydrous
product line
Redi-Dri™
assay
≥99.5%
form
crystals
quality
free-flowing
expl. lim.
8 %, 65 °F
impurities
Substances carbonizable by hot sulfuric acid, passes test
ign. residue
≤0.02%
pKa
(1) 3.13, (2) 4.76, (3) 6.4
mp
153-159 °C (lit.)
anion traces
chloride (Cl-): ≤0.001%
oxalate (C2O42-): passes test (limit about 0.003%)
phosphate (PO43-): ≤0.001%
sulfate (SO42-): ≤0.002%
cation traces
Fe: ≤3 ppm
Pb: ≤2 ppm
functional group
carboxylic acid
hydroxyl
Quality Level
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Verwandte Kategorien
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Dieser Artikel | 251275 | 3200-OP | W230618 |
|---|---|---|---|
| assay ≥99.5% | assay ≥99.5% | assay ≥99.5% | assay ≥99.5% |
| Quality Level 200 | Quality Level 200 | Quality Level 100 | Quality Level 400 |
| mp 153-159 °C (lit.) | mp 153-159 °C (lit.) | mp 153-159 °C (lit.) | mp 153-159 °C (lit.) |
| form crystals | form crystals | form crystalline powder (Fine) | form powder or granules |
| grade ACS reagent | grade ACS reagent | grade - | grade FG, Halal, Kosher |
| product line Redi-Dri™ | product line - | product line - | product line - |
Application
General description
Legal Information
signalword
Warning
hcodes
Hazard Classifications
Eye Irrit. 2 - STOT SE 3
target_organs
Respiratory system
Lagerklasse
11 - Combustible Solids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
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Artikel
Redi-Dri™ prevents hygroscopic powders, such as inorganic salts, from absorbing moisture and forming clumps, leaving the salts free-flowing every time.
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How can I determine the shelf life / expiration / retest date of this product?
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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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