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Merck
CN

21118

Calcium citrate tribasic tetrahydrate

BioUltra, ≥98.0% (calc. on dry substance, KT)

Synonym(s):

Citric acid calcium salt, Tricalcium dicitrate

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About This Item

Linear Formula:
Ca3(C6H5O7)2 · 4H2O
CAS Number:
Molecular Weight:
570.49
UNSPSC Code:
12161700
NACRES:
NA.25
PubChem Substance ID:
EC Number:
212-391-7
Beilstein/REAXYS Number:
3924520
MDL number:
Assay:
≥98.0% (calc. on dry substance, KT)
Grade:
reagent grade
Form:
powder
Solubility:
0.1 M HCl: 0.01 M at 20 °C, clear, colorless
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InChI key

LNIZKKFWMDARJV-UHFFFAOYSA-H

InChI

1S/2C6H8O7.3Ca.4H2O/c2*7-3(8)1-6(13,5(11)12)2-4(9)10;;;;;;;/h2*13H,1-2H2,(H,7,8)(H,9,10)(H,11,12);;;;4*1H2/q;;3*+2;;;;/p-6

SMILES string

O.O.O.O.OC1(CC(=O)O[Ca]OC(=O)C1)C(=O)O[Ca]OC(=O)C2(O)CC(=O)O[Ca]OC(=O)C2

grade

reagent grade

product line

BioUltra

assay

≥98.0% (calc. on dry substance, KT)

form

powder

impurities

Insoluble matter, passes filter test

loss

10-14% loss on drying, 180°C, 4 h

solubility

0.1 M HCl: 0.01 M at 20 °C, clear, colorless

anion traces

chloride (Cl-): ≤50 mg/kg, sulfate (SO42-): ≤100 mg/kg

cation traces

As: ≤0.1 mg/kg, Ba: ≤5 mg/kg, Bi: ≤5 mg/kg, Cd: ≤5 mg/kg, Co: ≤5 mg/kg, Cr: ≤5 mg/kg, Cu: ≤5 mg/kg, Fe: ≤50 mg/kg, Hg: ≤0.1 mg/kg, K: ≤500 mg/kg, Li: ≤5 mg/kg, Mg: ≤1000 mg/kg, Mn: ≤50 mg/kg, Mo: ≤5 mg/kg, Na: ≤100 mg/kg, Ni: ≤5 mg/kg, Pb: ≤1 mg/kg, Sr: ≤100 mg/kg, Zn: ≤5 mg/kg

λ

0.01 M in 0.1 M HCl

UV absorption

λ: 260 nm Amax: 0.04, λ: 280 nm Amax: 0.03

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Storage Class

11 - Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

Regulatory Information

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Morton G Burt et al.
Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research, 28(2), 412-418 (2012-09-20)
Calcium supplements have been associated with an increased risk of cardiovascular events. However, the validity of these findings has been questioned. A major concern is that the mechanism underlying an increase in cardiovascular events has not been demonstrated. Calcium initiates
José Manuel Quesada Gómez et al.
Clinical drug investigation, 31(5), 285-298 (2011-03-17)
The combination of calcium with vitamin D (vitamin D(3) [colecalciferol]) forms the basis of preventive and therapeutic regimens for osteoporosis. A number of studies have suggested that the combination of calcium and vitamin D is effective when administered at respective
Ram Sudheer Adluri et al.
Molecular and cellular biochemistry, 340(1-2), 73-80 (2010-03-10)
Calcium is an essential mineral to support bone health and serves as a major therapeutic intervention to prevent and delay the incidence of osteoporosis. Many individuals do not obtain the optimum amount of calcium from diets and depend on bioavailable
Isabelle Zamfirescu et al.
Thyroid : official journal of the American Thyroid Association, 21(5), 483-486 (2011-05-21)
Calcium carbonate is a commonly used dietary supplement and has been shown to interfere with levothyroxine absorption. However, calcium citrate, which is also used for supplementation purposes, has not been studied previously and calcium acetate, which is used to treat
Sherry Huang et al.
Nanotechnology, 20(37), 375102-375102 (2009-08-27)
Taking calcium supplements can reduce the risk of developing osteoporosis, but they are not readily absorbed in the gastrointestinal tract. Nanotechnology is expected to resolve this problem. In the present study, we examined whether the bioavailability of calcium carbonate and

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