Merck, 1134368-200MG, Citric acid
Size:200 mg, United States Pharmacopeia (USP) Reference Standard
Catalog Number: 1134368-200MG
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Pack Size200 mg
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| UNSPSC Code | 41116107 |
|---|---|
| NACRES | NA.24 |
| PubChem Substance ID | 329749410 |
| MDL number | MFCD00011669 |
| Beilstein/REAXYS Number | 782061 |
| 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 |
| InChI key | KRKNYBCHXYNGOX-UHFFFAOYSA-N |
| grade | pharmaceutical primary standard |
| API family | citric acid |
| form | crystalline |
| expl. lim. | 8 %, 65 °F |
| manufacturer/tradename | USP |
| pKa | (1) 3.13, (2) 4.76, (3) 6.4 |
| mp | 153-159 °C (lit.) |
| solubility | water: 383 g/L at 25 °C |
| application(s) | USP Biologicspharmaceutical (small molecule) |
| format | neat |
Answer:It is a United States Pharmacopeia pharmaceutical primary reference standard.
Answer:The package contains 200 mg.
Answer:The molecular weight is 192.12 g/mol.
Citric acid USP Reference Standard is used as a pharmaceutical primary standard for compendial testing, analytical method verification, calibration, and identity or purity assessment of citric acid materials. The crystalline reference material is issued under the United States Pharmacopeia program and is supplied as 200 mg. Citric acid has CAS number 77-92-9, molecular weight 192.12, and the structural formula HOC(COOH)(CH2COOH)2. Because the material is a pharmacopeial primary reference standard, laboratories use the value and instructions assigned by USP rather than treating it as an ordinary reagent. It is appropriate for quality-control laboratories testing pharmaceutical excipients, formulations, and biologics-related materials where citric acid is controlled by a compendial method. The small pack format is intended for analytical reference use rather than bulk formulation or routine buffer preparation.
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