Skip Navigation
ChemIDplus A TOXNET DATABASE LiteBrowseAdvanced

Substance Name: Calcium hydroxide [USP]
RN: 1305-62-0
UNII: PF5DZW74VN
InChIKey: AXCZMVOFGPJBDE-UHFFFAOYSA-L

Note

  • A white powder prepared from lime that has many medical and industrial uses. It is in many dental formulations, especially for root canal filling.

Molecular Formula

  • Ca-H2-O2

Molecular Weight

  • 74.0918
 

Classification Codes

Classification Codes

  • Agricultural Chemical
  • Astringent
  • Bone Cements
  • Mutation Data
  • Resins, Synthetic
  • Skin / Eye Irritant
  • Unspecified / Unclassified Pesticide

Superlist Classification Codes

  • TWA (15 mg/m3 total dust, 5 mg/m3 respirable fraction)
  • TWA 5 mg/m3

Names and Synonyms

Name of Substance

  • Calcium hydrate
  • Calcium hydroxide
  • Calcium hydroxide [USP]
  • Lime water

MeSH Heading

  • Calcium hydroxide

Synonyms

  • AI3-02602
  • Bell mine
  • Biocalc
  • Calbit
  • Calcium dihydroxide
  • Calcium hydrate
  • Calcium hydroxide
  • Caldic 1000
  • Calvit
  • Carboxide
  • Caswell No. 144
  • CCRIS 9335
  • EC 215-137-3
  • EINECS 215-137-3
  • EPA Pesticide Chemical Code 075601
  • HSDB 919
  • Hydralime
  • Hydrated lime
  • Kalkhydrate
  • Kemikal
  • Kentoku K 100
  • Limbux
  • Lime hydrate
  • Lime milk
  • Lime water
  • Milk of lime
  • NICC 3000
  • Rhenofit CF
  • Sa 074
  • Slaked lime
  • Super Microstar
  • UNII-PF5DZW74VN
  • Yukijirushisakanyo

Systematic Names

  • Calcium dihydroxide
  • Calcium hydroxide
  • Calcium hydroxide (Ca(OH)2)

Superlist Names

  • Calcium hydrate
  • Calcium hydroxide
  • Calcium hydroxide slurry
  • Slaked lime

Registry Numbers

CAS Registry Number

  • 1305-62-0

FDA UNII

  • PF5DZW74VN

Other Registry Numbers

  • 1333-29-5
  • 7719-01-9

System Generated Number

  • 0001305620

Structure Descriptors

InChI

1S/Ca.2H2O/h;2*1H2/q+2;;/p-2

InChIKey

AXCZMVOFGPJBDE-UHFFFAOYSA-L

Smiles

[Ca](O)O

Toxicity

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 oral 7300mg/kg (7300mg/kg)   Yakkyoku. Pharmacy. Vol. 32, Pg. 1477, 1981.
rat LD50 oral 7340mg/kg (7340mg/kg)   American Industrial Hygiene Association Journal. Vol. 30, Pg. 470, 1969.