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256501

Sigma-Aldrich

Calcium carbonate

ACS reagent, ≥99.0%, low in alkalies

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About This Item

Linear Formula:
CaCO3
CAS Number:
471-34-1
Molecular Weight:
100.09
Beilstein:
8008338
EC Number:
207-439-9
MDL number:
MFCD00010906
UNSPSC Code:
12352300
PubChem Substance ID:
24855531

grade

ACS reagent

Assay

≥99.0%

impurities

≤0.01% NH4OH pptd.
≤0.01% insol. dil. HCl

density

2.93 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤0.001%
fluoride (F-): ≤0.0015%
sulfate (SO42-): ≤0.005%

cation traces

Ba: ≤0.01%
Fe: ≤0.002%
K: ≤0.01%
Mg: ≤0.01%
NH4+: ≤0.003%
Na: ≤0.01%
Sr: ≤0.1%
heavy metals (as Pb): ≤0.001%

SMILES string

[Ca++].[O-]C([O-])=O

InChI

1S/CH2O3.Ca/c2-1(3)4;/h(H2,2,3,4);/q;+2/p-2

InChI key

VTYYLEPIZMXCLO-UHFFFAOYSA-L

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Other Notes

A -D suffix exists for administrative purposes only.
All -D packages are 100% the same product, same quality, same specification as the package sizes previously sold without a -D.

Storage Class Code

13 - Non Combustible Solids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
06030EH
07725EE
10905EU
07918CY
05325AN

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Carlos H Larramendi et al.
Annals of allergy, asthma & immunology : official publication of the American College of Allergy, Asthma, & Immunology, 110(5), 335-339 (2013-04-30)
Nondietary exposure to milk proteins may be a risk for children who do not outgrow milk allergy by school age. To study the allergenicity of casein containing chalk. A 6-year-old, milk allergic child developed asthma and rhinoconjunctivitis while in school.
Laura C Foster et al.
Proceedings of the National Academy of Sciences of the United States of America, 110(23), 9273-9276 (2013-05-22)
Predicting the impact of ongoing anthropogenic CO2 emissions on calcifying marine organisms is complex, owing to the synergy between direct changes (acidification) and indirect changes through climate change (e.g., warming, changes in ocean circulation, and deoxygenation). Laboratory experiments, particularly on
Matthew S Lachniet et al.
Proceedings of the National Academy of Sciences of the United States of America, 110(23), 9255-9260 (2013-05-22)
The dominant controls on global paleomonsoon strength include summer insolation driven by precession cycles, ocean circulation through its influence on atmospheric circulation, and sea-surface temperatures. However, few records from the summer North American Monsoon system are available to test for
Miao Xuefei et al.
Water science and technology : a journal of the International Association on Water Pollution Research, 67(12), 2784-2790 (2013-06-22)
The present study investigated the effectiveness of electromagnetic fields in preventing calcium carbonate (CaCO₃) fouling in cooling water. Four different frequencies and two different voltages were adopted to induce electromagnetic fields directly in water with constant water temperature and constant
Guoqing Zhang et al.
Materials science & engineering. C, Materials for biological applications, 33(4), 2046-2049 (2013-03-19)
The polymorphic phase transformation of thermally treated pearl powder was investigated by X-ray diffraction and thermoanalytical techniques. The phase transformation was based on quantification of the calcite content at various temperatures using Rietveld refinement analysis. The results show that the
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