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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
251275
Citric acid
ACS reagent grade, ≥99.5%, crystals
Synonym(s):
2-Hydroxy-1,2,3-propanetricarboxylic acid, 2-Hydroxypropan-1,2,3-tricarboxylic acid
Select a Size
| Size/SKU | Availability | Price |
|---|---|---|
5 g | Available to ship TODAYfromMILWAUKEE | $54.70 |
100 g | Available to ship TODAYfromMILWAUKEE | $58.40 |
500 g | Available to ship TODAYfromMILWAUKEE | $97.50 |
2.5 kg | Available to ship TODAYfromMILWAUKEE | $328.00 |
12 kg | Available to ship TODAYfromMILWAUKEE | $928.00 |
About This Item
$54.70
Available to ship TODAYDetails
Product Name
Citric acid, ACS reagent, ≥99.5%
grade
ACS reagent
Quality Segment
assay
≥99.5%
form
crystals
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
storage temp.
room temp
SMILES string
OC(=O)CC(O)(CC(O)=O)C(O)=O
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)
InChI key
KRKNYBCHXYNGOX-UHFFFAOYSA-N
Gene Information
human ... SRC(6714)
General description
Application
- Phosphate citrate buffer for use in enzyme-linked immunosorbent assay.
- Citrate-stabilized ceria aqueous sol, which was employed in the synthesis of cerium oxide nanoparticles.
- Citric acid-Na2HPO4-buffered stock solution for use in the determination of fecal urease activity.[1]
- Anticoagulant citrate dextrose solution A (ACD-A), which is employed during the isolation of blood-derived endothelial progenitor cells.[2]
Citric acid has also been used:
- In a novel process which allows controlling of the particle size during the synthesis of palladium cuboctahedrons.
- To prepare citric acid-derived carbon nanodots (CNDs) by bottom-up carbonization method.
- As a bi-component chelating agent for the synthesis of Li4Ti5O12 (lithium titanate oxide) by a novel sol–gel method.
Other Notes
Legal Information
1 of 1
This Item | |||
|---|---|---|---|
| assay ≥99.5% | assay ≥99.5% | assay ≥99.5% (T) | assay ≥99.5% |
| Quality Level 200 | Quality Level 300, 400 | Quality Level 200 | Quality Level 200 |
| mp 153-159 °C (lit.) | mp 153-159 °C (lit.) | mp 153-159 °C (lit.) | mp 153-159 °C (lit.) |
| storage temp. room temp | storage temp. - | storage temp. - | storage temp. - |
| form crystals | form powder or granules | form powder or crystals | form crystals |
| expl. lim. 8 %, 65 °F | expl. lim. 8 %, 65 °F | expl. lim. 8 %, 65 °F | expl. lim. 8 %, 65 °F |
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signalword
Warning
hcodes
Hazard Classifications
Eye Irrit. 2 - STOT SE 3
target_organs
Respiratory system
Storage Class
11 - Combustible Solids
flash_point_f
Not applicable
flash_point_c
Not applicable
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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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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Technical question: is this product sourced in the EU. Is it for RUO.
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Yes, this product is intended for research use only. The country of origin may vary lot to lot.
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Do you have a recommendation for an expiry date after opening this reagent (storage in dry place at RT)?
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This product does not contain an expiration date or recommended retest date. Products with no expiration date or recommended retest date should be routinely inspected by customers 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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