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Cesium hydroxide

Names

[ CAS No. ]:
21351-79-1

[ Name ]:
Cesium hydroxide

[Synonym ]:
Cesium hydroxide
MFCD00010964
Caesium hydroxide
EINECS 244-344-1

Chemical & Physical Properties

[ Density]:
3.68 g/mL at 25 °C(lit.)

[ Boiling Point ]:
100ºC at 760 mmHg

[ Melting Point ]:
272 °C(lit.)

[ Molecular Formula ]:
CsOH

[ Molecular Weight ]:
149.913

[ Exact Mass ]:
149.908188

[ PSA ]:
23.06000

[ Stability ]:
Stable. Incompatible with acids. Absorbs carbon dioxide from the air.

[ Water Solubility ]:
soluble

MSDS

Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :
FK9800000
CHEMICAL NAME :
Cesium hydroxide
CAS REGISTRY NUMBER :
21351-79-1
LAST UPDATED :
199712
DATA ITEMS CITED :
20
MOLECULAR FORMULA :
Cs-H-O
MOLECULAR WEIGHT :
149.92
WISWESSER LINE NOTATION :
CS Q

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
Standard Draize test
ROUTE OF EXPOSURE :
Administration onto the skin
SPECIES OBSERVED :
Rodent - rabbit
REFERENCE :
TXAPA9 Toxicology and Applied Pharmacology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1959- Volume(issue)/page/year: 32,239,1975
TYPE OF TEST :
Rinsed with water
ROUTE OF EXPOSURE :
Administration into the eye
SPECIES OBSERVED :
Rodent - rabbit
REFERENCE :
TXAPA9 Toxicology and Applied Pharmacology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1959- Volume(issue)/page/year: 32,239,1975 ** ACUTE TOXICITY DATA **
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
570 mg/kg
TOXIC EFFECTS :
Behavioral - somnolence (general depressed activity) Behavioral - muscle contraction or spasticity Lungs, Thorax, or Respiration - other changes
REFERENCE :
GTPZAB Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1-36, 1957-1992. For publisher information, see MTPEEI Volume(issue)/page/year: 21(1),29,1977
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
100 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
AIHOAX Archives of Industrial Hygiene and Occupational Medicine. (Chicago, IL) V.1-2(3), 1950. For publisher information, see AEHLAU. Volume(issue)/page/year: 1,637,1950
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
800 mg/kg
TOXIC EFFECTS :
Behavioral - tetany
REFERENCE :
20PKA3 "Novye Dannye Po Toksikologii Redkikh Metalov Ikh Soedinenii," New Data on the Toxicology of Rare Metals and Their Compounds, Izrael'son, Z.I., ed., Moscow, Izdatel'stvo "Meditsina," 1967 Volume(issue)/page/year: -,-,1967 ** OTHER MULTIPLE DOSE TOXICITY DATA **
TYPE OF TEST :
TCLo - Lowest published toxic concentration
ROUTE OF EXPOSURE :
Inhalation
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
10110 ug/m3/17W-I
REFERENCE :
GTPZAB Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1-36, 1957-1992. For publisher information, see MTPEEI Volume(issue)/page/year: 21(1),29,1977 *** REVIEWS *** ACGIH TLV-TWA 2 mg/m3 DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: TLV/BEI,1997 *** OCCUPATIONAL EXPOSURE LIMITS *** OEL-AUSTRALIA:TWA 2 mg/m3 JAN 1993 OEL-BELGIUM:TWA 2 mg/m3 JAN 1993 OEL-DENMARK:TWA 2 mg/m3 JAN 1993 OEL-FINLAND:TWA 2 mg/m3 JAN 1993 OEL-FRANCE:TWA 2 mg/m3 JAN 1993 OEL-THE NETHERLANDS:TWA 2 mg/m3 JAN 1993 OEL-RUSSIA:STEL 0.3 mg/m3 JAN 1993 OEL-SWITZERLAND:TWA 2 mg/m3 JAN 1993 OEL-UNITED KINGDOM:TWA 2 mg/m3 JAN 1993 OEL IN BULGARIA, COLOMBIA, JORDAN, KOREA check ACGIH TLV OEL IN NEW ZEALAND, SINGAPORE, VIETNAM check ACGIH TLV *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH RECOMMENDED EXPOSURE LEVEL (REL) : NIOSH REL TO CESIUM HYDROXIDE-air:10H TWA 2.0 mg/m3 REFERENCE : NIOSH* National Institute for Occupational Safety and Health, U.S. Dept. of Health, Education, and Welfare, Reports and Memoranda. Volume(issue)/page/year: DHHS #92-100,1992

Safety Information

[ Symbol ]:

GHS05, GHS07

[ Signal Word ]:
Danger

[ Hazard Statements ]:
H302-H314

[ Precautionary Statements ]:
P280-P305 + P351 + P338-P310

[ Hazard Codes ]:
C:Corrosive

[ Risk Phrases ]:
R22;R35

[ Safety Phrases ]:
S26-S36/37/39-S45-S37/39-S27-S28

[ RIDADR ]:
UN 2682 8/PG 2

[ WGK Germany ]:
3

[ Packaging Group ]:
II

[ Hazard Class ]:
8

[ HS Code ]:
2825909000

Customs

[ HS Code ]: 2825909000

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