Citric acid monohydrate, (based on anhydrous substance), puriss., meets analytical specification of Ph. Eur., BP, USP, E330, 99.5-100.5% (based on anhydrous substance), grit

Code: 27102-1KG-R D2-231

Application

ETH 7061 may be used in bulk flow optode, used for determination of perchlorate.

Citric acid monohydrate may be used in the diltiazem hydrochloride (drug) a...


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Application

ETH 7061 may be used in bulk flow optode, used for determination of perchlorate.

Citric acid monohydrate may be used in the diltiazem hydrochloride (drug) and melt extruded Eudragit RS PO (polymer) formulations. It improves the solubility of drug in the polymer matrix. It may be used to prepare citrate buffer for use in the intravital microscopic studies of adhesion and aggregation of platelets.

General description

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Chromoionophore XI (fluorescein octadecyl ester, ETH 7061) is a lipophilized pH indicator.

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

Legal Information

Selectophore is a trademark of Sigma-Aldrich Chemie GmbH

Other Notes

Chromoionophore in chloride-selective optodes; Ionophore used in an alcohol-selective electrode; Lipophilic pH indicator

Packaging

Bottomless glass bottle. Contents are inside inserted fused cone.

InChI1S/C38H48O5/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-19-26-42-38(41)32-21-18-17-20-31(32)37-33-24-22-29(39)27-35(33)43-36-28-30(40)23-25-34(36)37/h17-18,20-25,27-28,39H,2-16,19,26H2,1H3
InChI1S/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 keyUDHKRSZNYLYOEP-UHFFFAOYSA-N
InChI keyYASYEJJMZJALEJ-UHFFFAOYSA-N
gradeSelectophore™
gradepuriss.
Quality Level100
Quality Level200
SMILES stringCCCCCCCCCCCCCCCCCCOC(=O)c1ccccc1C2=C3C=CC(=O)C=C3Oc4cc(O)ccc24
SMILES stringOC(CC(O)(C(O)=O)CC(O)=O)=O.O
anion tracesoxalate (as oxalic acid): ≤100 mg/kg
anion tracessulfate (SO42-): ≤100 mg/kg
anion traceschloride (Cl-): ≤50 mg/kg
pKa(1) 3.13, (2) 4.76, (3) 6.4
cation tracesCu: ≤10 mg/kg
cation tracesFe: ≤10 mg/kg
cation tracesAs: ≤1 mg/kg
cation tracesZn: ≤10 mg/kg
cation tracesPb: ≤1 mg/kg
cation tracesCa: ≤200 mg/kg
cation tracesHg: ≤1 mg/kg
ign. residue≤0.05% (as SO4)
suitabilitycomplies for reaction against H2SO4
suitabilitycomplies for identity (IR)
suitabilitycomplies for appearance of solution
impurities7.5-8.8% water (Karl Fischer)
impurities≤0.0005% heavy metals (as Pb)
impuritiesresidual solvents, complies
formgrit
qualitymeets analytical specification of Ph. Eur., BP, USP, E330
assay99.5-100.5% (based on anhydrous substance)
Cas Number5949-29-1
This product has met the following criteria: