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
C1909
Acido citrico
ACS reagent grade, ≥99.0%, powder
Sinonimo/i:
2-hydroxy-1,2,3-propanetricarboxylic acid monohydrate
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| A voi/SKU | Disponibilità | Prezzo |
|---|---|---|
25 g | Per informazioni sulla disponibilità, contatta il Servizio Clienti. | 58,80 € |
500 g | Per informazioni sulla disponibilità, contatta il Servizio Clienti. | 80,80 € |
1 kg | Per informazioni sulla disponibilità, contatta il Servizio Clienti. | 130,00 € |
2.5 kg | Per informazioni sulla disponibilità, contatta il Servizio Clienti. | 179,00 € |
12 kg | Per informazioni sulla disponibilità, contatta il Servizio Clienti. | 630,00 € |
Informazioni su questo articolo
58,80 €
Nome del prodotto
Acido citrico, ACS reagent, ≥99.0%
grade
ACS reagent
Quality Segment
assay
≥99.0%
form
powder
impurities
Substances carbonizable by hot sulfuric acid, passes test, ≤0.005% Insoluble matter
ign. residue
≤0.02%
pH
(1.8 at 50 g/l at 20 °C)
pKa
(1) 3.13, (2) 4.76, (3) 6.4
solubility
H2O: soluble 54 % (w/w) at 10 °C (Citric acid in water), H2O: 59.2 % (w/w) at 20 °C (Citric acid in water), H2O: 84.0 % (w/w) at 100 °C (Citric acid in water)
anion traces
chloride (Cl-): ≤0.001%, oxalate (C2O42-): passes test (limit about 0.05%), phosphate (PO43-): ≤0.001%, sulfate (SO42-): ≤0.002%
cation traces
Fe: ≤3 ppm, Pb: ≤2 ppm
functional group
carboxylic acid
SMILES string
OC(CC(O)(C(O)=O)CC(O)=O)=O.O
InChI
1S/C6H8O7.H2O/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);1H2
InChI key
YASYEJJMZJALEJ-UHFFFAOYSA-N
General description
Citric acid monohydrate is an organic weak acid used as a natural preservative in food and beverage products.
Application
It may be used:
- As release-modifying agent to improve the release of diltiazem hydrochloride from melt extruded Eudragit RS PO tablets.[2]
- To prepare citrate buffer for use in the preparation of platelets for intravital microscopy.[3]
- To prepare Tris-citrate buffer employed for the electrophoresis of bacterial enzymes.[4]
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Questo articolo | |||
|---|---|---|---|
| grade ACS reagent | grade ACS reagent, puriss. p.a. | grade reagent grade | grade - |
| assay ≥99.0% | assay 99.5-100.5% (calc. on anhydrous substance), 99.5-102% | assay ≥98% (GC/titration) | assay ≥99.5% |
| Quality Level 200 | Quality Level 200 | Quality Level 300 | Quality Level 200 |
| form powder | form solid | form powder | form powder |
| pH (1.8 at 50 g/l at 20 °C) | pH - | pH - | pH 1.85 (25 °C, 50 g/L) |
| solubility H2O: soluble 54 % (w/w) at 10 °C (Citric acid in water), H2O: 84.0 % (w/w) at 100 °C (Citric acid in water), H2O: 59.2 % (w/w) at 20 °C (Citric acid in water) | solubility - | solubility H2O: 100 mg/mL, clear, colorless (Turbidity) | solubility H2O: 1 M, clear, colorless |
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signalword
Warning
hcodes
Hazard Classifications
Eye Irrit. 2 - STOT SE 3
target_organs
Respiratory system
Classe di stoccaggio
11 - Combustible Solids
wgk
WGK 1
flash_point_f
345.0 °F - closed cup
flash_point_c
173.9 °C - closed cup
ppe
dust mask type N95 (US), Eyeshields, Gloves
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How can I determine the shelf life / expiration / retest date of this product?
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I need to prepare 100 ml of 1 molar citric acid solution. How do I prepare this and which product do I need to buy?
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The volume of 100 mL is equivalent to 0.1 Liters. And 1 molar (1 mole per liter) times 0.1 liters equals 0.1 moles. The molecular weight for Citric Acid Monohydrate is 210.14 grams per mole. And 0.1 moles times 210.14 grams per mole equals 21.0 grams. So to prepare the solution, dissolve 21.0 grams of citric acid monohydrate in about 75 mL of pure water, then bring the final volume to 100 mL. Citric Acid Monohydrate is very soluble in water.
As far as which product to buy, many grades of citric acid and citric acid monohydrate are listed. Please contact your local Technical Service group and describe your intended application so that they can help you choose the appropriate grade.Utile?
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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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