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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 271Generated: October 26, 2026

Calcium Cation

CALCIUM ION · Calcium ions · Calcium cation · Calcium(2+)ions · Unii-2m83C4R6zb · Calcium, ion (ca2+) · CALCIUM ION STANDARD · Calcium standard for IC

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Calcium Cation molecular structure

Identifiers & Physical Properties

CAS No.14127-61-8
Molecular formulaCa+2
Average molar mass40.08 g/mol
Monoisotopic mass39.96149382 g/mol
SMILES[Ca+2]
InChIKeyBHPQYMZQTOCNFJ-UHFFFAOYSA-N
PubChem CID271
ChEBICHEBI:29108
DTXSIDDTXSID7037638

Chemical & Physical Properties

Topological polar surface area0
Hydrogen bond donors0
Hydrogen bond acceptors0
Rotatable bonds0
Heavy atoms1
Formal charge2
Complexity0
Melting point850 °C
Physical DescriptionSolid
Density1.04 g/mL at 20 °C
Physical stateLiquid
Merck13,1687
Major applicationsenvironmentalfood and beverages
FDA UNII2M83C4R6ZB
UNSPSC Code41116107
NACRESNA.24
Personal protective equipment (PPE)Eyeshields, Gloves
Hazard symbolsXi,C
Risk statements (R)36/38-36/37/38-34
Safety statements (S)26-36-24/25-36/37-45-36/37/39
UN transport numberUN 3264 8/PG 3
Water hazard class (WGK)1
Hazard class8
Packing groupIII
Storage class12 - Non Combustible Liquids

Safety & Regulations

Toxicity summaryCalcium plays a vital role in the anatomy, physiology and biochemistry of organisms and of the cell, particularly in signal transduction pathways. More than 500 human proteins are known to bind or transport calcium. The skeleton acts as a major mineral storage site for the element and releases Ca2+ ions into the bloodstream under controlled conditions. Circulating calcium is either in the free, ionized form or bound to blood proteins such as serum albumin. Parathyroid hormone (secreted from the parathyroid gland) regulates the resorption of Ca2+ from bone. Calcitonin stimulates incorporation of calcium in bone, although this process is largely independent of calcitonin. Although calcium flow to and from the bone is neutral, about 5 mmol is turned over a day. Bone serves as an important storage point for calcium, as it contains 99% of the total body calcium. Low calcium intake may also be a risk factor in the development of osteoporosis. The best-absorbed form of calcium from a pill is a calcium salt like carbonate or phosphate. Calcium gluconate and calcium lactate are absorbed well by pregnant women. Seniors absorb calcium lactate, gluconate and citrate better unless they take their calcium supplement with a full breakfast. The currently recommended calcium intake is 1,500 milligrams per day for women not taking estrogen and 800 milligrams per day for women on estrogen. There is close to 300 milligrams of calcium in one cup of fluid milk. Calcium carbonate is currently the best and least expensive form of calcium supplement available.
Carcinogen ClassificationNo indication of carcinogenicity to humans (not listed by IARC).
Personal protective equipment (PPE)Eyeshields, Gloves
Water hazard class (WGK)1
UN transport numberUN 3264 8/PG 3
Risk statements (R)36/38-36/37/38-34
Hazard symbolsXi,C
Safety statements (S)26-36-24/25-36/37-45-36/37/39
Hazard class8
Storage class12 - Non Combustible Liquids
Packing groupIII

Applications & Uses

Uses

Calcium ICP standard is a suitable calibration standard for elemental analysis by Inductively Coupled Plasma (ICP) technique.