Calcium Hydroxide

CAS 1305-62-0  ·  CaH₂O₂  ·  MW 74.09 g/mol

Full record: Calcium Hydroxide — Safety Data Sheet →

Loading molecule...
3D model Calcium Hydroxide, CAS 1305-62-0, molecular formula CaH₂O₂, molar mass 74.09 g/mol
About Calcium Hydroxide

Calcium Hydroxide is a chemical compound registered under number CAS 1305-62-0, with the molecular formula CaH₂O₂, and a molar mass of 74.09 g/mol.

The molecule contains 5 atoms connected by 2 chemical bonds. The full systematic IUPAC name of this compound is calcium dihydroxide. The interactive 3D model above lets you view the spatial arrangement of the atoms — you can rotate it with the mouse, zoom with the scroll wheel, and switch between skeletal / Ball & Stick / Space Fill visualization modes.

In terms of physicochemical properties, polar surface area PSA = 2 Ų, 2 donors and 2 hydrogen bond acceptors. These parameters are key when assessing bioavailability and interaction with biomolecules.

Chemical data for this compound comes from PubChem (NIH NLM NCBI), one of the world's largest chemical databases. All information is updated automatically and enriched with GHS hazard statement translations compliant with the CLP Regulation (EC 1272/2008). The interactive 3D model and the viewer images are protected by copyright (© MolGod.org) — terms of use: molgod.org/copyright/.

Physicochemical properties
Molecular formulaCaH₂O₂
Molar mass74.09 g/mol
IUPACcalcium dihydroxide
SMILES[OH-].[OH-].[Ca+2]
InChIKeyAXCZMVOFGPJBDE-UHFFFAOYSA-L
logP (XLogP3)—
PSA2 Ų
HBD / HBA2 / 2
PubChem CIDCID 6093208 ↗
GHS safety

Signal word: Danger

GHS05
GHS05
GHS07
GHS07
GHS08
GHS08

H318 — Causes serious eye damage

H315 — Causes skin irritation

H370 — Causes damage to organs

H373 — May cause damage to organs through prolonged or repeated exposure

H335 — May cause respiratory irritation

H402 — Harmful to aquatic life

Scientific literature

Related literature

3 articles · 1 open access · Sources: PubMed, OpenAlex, Semantic Scholar

Filters:Export:📄 BibTeX📑 RIS📋 EndNote🔧 CSL-JSON

📈 Publication timeline (number of articles: 3)

2004: number of articles 120042022: number of articles 120222025: number of articles 12025

Bar height = number of articles in a given year. Hover over a bar to see details.

Data from PubMed (NIH NLM), OpenAlex (CC0), Semantic Scholar (AI2). AI Summary generated by Semantic Scholar TLDR. Articles marked with require paid access.

Synonyms
CALCIUM HYDROXIDE · 1305-62-0 · Slaked lime · Hydrated lime · Lime hydrate · Calcium hydrate · Lime water · Calcium hydroxide (Ca(OH)2) · Hydralime · Slaked-lime · Lime milk · Calcarea caustica · INS NO.526 · PF5DZW74VN · E-526
Data sources
📜 License & provenancePREDICTED MODEL · NOT VERIFIEDMolGod_License_1
PREDICTED MODEL — NOT VERIFIED
computed by MolGod Scientific · experimental feature (beta) · may contain errors
ILLUSTRATIVE FRAGMENT ARRANGEMENT — relative positions are not structural data

No source 3-D conformer was available to MolGod for this substance. MolGod Scientific computed this geometry from the structural formula with RDKit 2026.03.6 (ETKDGv3 conformer generation, MMFF94 force-field optimisation; lowest-energy converged conformer of a fixed-seed set). It is not a measured structure, it does not come from PubChem, and it has not been compared with experimental data. It shows one possible conformation.

This substance consists of 3 separate components (for example ions). Each component was computed separately; they are arranged radially around a layout anchor for visualisation only (at least 3.0 Å apart). Their relative positions are not a crystal structure, coordination geometry, ionic contacts or any experimentally determined arrangement.

Methods and references
  1. RDKit: Open-source cheminformatics, version 2026.03.6. Zenodo. doi:10.5281/zenodo.22140358 (all versions: doi:10.5281/zenodo.591637)
  2. Riniker S, Landrum GA. Better Informed Distance Geometry: Using What We Know To Improve Conformation Generation. J. Chem. Inf. Model. 2015, 55, 2562-2574. doi:10.1021/acs.jcim.5b00654
  3. Wang S, Witek J, Landrum GA, Riniker S. Improving Conformer Generation for Small Rings and Macrocycles Based on Distance Geometry and Experimental Torsional-Angle Preferences. J. Chem. Inf. Model. 2020, 60, 2044-2058. doi:10.1021/acs.jcim.0c00025
  4. Halgren TA. Merck molecular force field. I. Basis, form, scope, parameterization, and performance of MMFF94. J. Comput. Chem. 1996, 17, 490-519. doi:10.1002/(SICI)1096-987X(199604)17:5/6<490::AID-JCC1>3.0.CO;2-P
  5. Tosco P, Stiefl N, Landrum G. Bringing the MMFF force field to the RDKit: implementation and validation. J. Cheminform. 2014, 6, 37. doi:10.1186/s13321-014-0037-3
  6. Heller SR, McNaught A, Pletnev I, Stein S, Tchekhovskoi D. InChI, the IUPAC International Chemical Identifier. J. Cheminform. 2015, 7, 23. doi:10.1186/s13321-015-0068-4
  7. Kim S, Chen J, Cheng T, et al. PubChem 2025 update. Nucleic Acids Res. 2025, 53, D1516-D1525. doi:10.1093/nar/gkae1059 Compound record: https://pubchem.ncbi.nlm.nih.gov/compound/6093208
  8. Bolton EE, Kim S, Bryant SH. PubChem3D: Conformer generation. J. Cheminform. 2011, 3, 4. doi:10.1186/1758-2946-3-4 (cited for contrast: no source 3-D conformer was available to MolGod for this record)
Model
Calcium Hydroxide · 1305-62-0
InChIKey
AXCZMVOFGPJBDE-UHFFFAOYSA-L
License & provenance record
Calcium Hydroxide (CAS 1305-62-0) →
MolGod molecule record
Calcium Hydroxide →
Source data
PubChem CID 6093208 ↗
Model information
not published yet

This license applies to the MolGod-created STL mesh, not automatically to third-party source material.

—