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Merck

33114

クエン酸 一水和物

ACS reagent grade, 99.5-102%, solid, puriss. p.a., reag. ISO, reag. Ph. Eur., buffer substance

別名:

2-hydroxy-1,2,3-propanetricarboxylic acid monohydrate

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この商品について

化学式:
HOC(COOH)(CH2COOH)2 · H2O
CAS番号:
5949-29-1
分子量:
210.14
NACRES:
NA.21
PubChem Substance ID:
57648756
UNSPSC Code:
12352100
EC Number:
201-069-1
MDL number:
MFCD00149972
Beilstein/REAXYS Number:
4018641

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製品名

クエン酸 一水和物, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., buffer substance, 99.5-102%

InChI key

YASYEJJMZJALEJ-UHFFFAOYSA-N

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

SMILES string

OC(CC(O)(C(O)=O)CC(O)=O)=O.O

grade

ACS reagent
puriss. p.a.

agency

USP/NF
reag. ISO
reag. Ph. Eur.

assay

99.5-100.5% (calc. on anhydrous substance)
99.5-102%

form

solid

impurities

≤0.005% insolubles in water
≤2 ppm heavy metals (as Pb)
7.5-9.0% water (Karl Fischer)

ign. residue

≤0.01% (as SO4)

pKa 

(1) 3.13, (2) 4.76, (3) 6.4

anion traces

chloride (Cl-): ≤5 mg/kg
oxalate (C2O42-): ≤100 ppm
phosphate (PO43-): ≤10 mg/kg
sulfate (SO42-): ≤20 ppm

cation traces

Ca: ≤50 mg/kg
Cu: ≤5 mg/kg
Fe: ≤3 ppm
Pb: ≤2 ppm
Zn: ≤5 mg/kg

suitability

complies for appearance of solution
complies for reaction against H2SO4

functional group

carboxylic acid

Quality Level

200

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当該品目
27102C1909C7129
クエン酸 一水和物 puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., buffer substance, 99.5-102%

Sigma-Aldrich

33114

クエン酸 一水和物

クエン酸 一水和物 puriss., meets analytical specification of Ph. Eur., BP, USP, E330, 99.5-100.5% (based on anhydrous substance), grit

Sigma-Aldrich

27102

クエン酸 一水和物

クエン酸 一水和物 ACS reagent, ≥99.0%

Sigma-Aldrich

C1909

クエン酸 一水和物

クエン酸 一水和物 reagent grade, ≥98% (GC/titration)

Sigma-Aldrich

C7129

クエン酸 一水和物

grade

ACS reagent, puriss. p.a.

grade

-

grade

ACS reagent

grade

reagent grade

assay

99.5-100.5% (calc. on anhydrous substance), 99.5-102%

assay

99.5-100.5% (based on anhydrous substance)

assay

≥99.0%

assay

≥98% (GC/titration)

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

300

agency

USP/NF, reag. Ph. Eur., reag. ISO

agency

-

agency

-

agency

-

form

solid

form

grit

form

powder

form

powder

anion traces

chloride (Cl-): ≤5 mg/kg, phosphate (PO43-): ≤10 mg/kg, oxalate (C2O42-): ≤50 ppm, sulfate (SO42-): ≤20 ppm

anion traces

chloride (Cl-): ≤50 mg/kg, oxalate (as oxalic acid): ≤100 mg/kg, sulfate (SO42-): ≤100 mg/kg

anion traces

chloride (Cl-): ≤0.001%, oxalate (C2O42-): passes test (limit about 0.05%), phosphate (PO43-): ≤0.001%, sulfate (SO42-): ≤0.002%

anion traces

-

Application

Citric acid monohydrate may be used in the preparation of tris-citrate buffer[1] and Otto I isolation buffer used in bioprotocols.[2] It may also be used to improve the release of diltiazem hydrochloride from melt extruded matrix tablets.[3]

General description

Citric acid monohydrate is an organic acid. Its molar enthalpy of solution in water has been reported to be ΔsolHm (298.15K, m = 0.0203molkg-1) = (29061 ± 123)Jmol-1.[4]

pictograms

Exclamation mark
GHS07

signalword

Warning

hcodes

H319,H335

Hazard Classifications

Eye Irrit. 2 - STOT SE 3

target_organs

Respiratory system

保管分類

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

最新バージョンのいずれかを選択してください：

試験成績書（COA）

Lot/Batch Number
BCCP0211
BCCN3805
SDBB2149
STBL3472
SDBB0355

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特定のバージョンが必要な場合は、ロット番号またはバッチ番号で特定の証明書を検索できます。

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以前この製品を購入いただいたことがある場合

文書ライブラリで、最近購入した製品の文書を検索できます。

文書ライブラリにアクセスする

Citric acid monohydrate as a release-modifying agent in melt extruded matrix tablets.
Schilling SU, et al.
International Journal of Pharmaceutics, 361(1), 158-168 (2008)
Determination of the Developmental Origin of Seeds Containing Endosperm Using Flow Cytometric Analysis
Sailer C, et al.
PLoS Genetics, 5(11) (2015)
Methods of multilocus enzyme electrophoresis for bacterial population genetics and systematics.
R K Selander et al.
Applied and environmental microbiology, 51(5), 873-884 (1986-05-01)
S Massberg et al.
The Journal of experimental medicine, 189(8), 1255-1264 (1999-04-20)
Atherosclerotic vascular lesions are considered to be a major cause of ischemic diseases, including myocardial infarction and stroke. Platelet adhesion and aggregation during ischemia-reperfusion are thought to be the initial steps leading to remodeling and reocclusion of the postischemic vasculature.
Sandra U Schilling et al.
International journal of pharmaceutics, 361(1-2), 158-168 (2008-06-28)
Incomplete drug release and particle size-dependent dissolution performance can compromise the quality of controlled release matrix systems. The objective of the current study was to investigate the ability of citric acid monohydrate (CA MH) to enhance the release of diltiazem
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質問

1–2/2 質問  

  1. How can I determine the shelf life / expiration / retest date of this product?

    1 回答

    1. 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

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 回答

    1. 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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