Caesium chromate

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Caesium chromate
IUPAC name caesium chromate
Identifiers
InChI InChI=1/Cr.2Cs.4O/q;2*+1;;;2*-1/rCrO4.2Cs/c2-1(3,4)5;;/q-2;2*+1
InChIKey BROHICCPQMHYFY-UICSPCLAAP
Standard InChI InChI=1S/Cr.2Cs.4O/q;2*+1;;;2*-1
Standard InChIKey BROHICCPQMHYFY-UHFFFAOYSA-N
CAS number [13454-78-9]
EC number 236-640-4
ChemSpider 55521
PubChem 61613
Properties[1]
Molecular formula CrCs2O4
Molar mass 381.8 g mol−1
Appearance Yellow crystalline solid
Density 4.237 g/cm3
Solubility in water 71.4 g/100 ml (13 ºC)
Hazards[2][3]
EU index number 024-017-00-8
GHS pictograms Carc. 1BSkin Sens. 1Aquatic Acute 1, Aquatic Chronic 1
GHS signal word DANGER
GHS hazard statements H350, H317, H410
Flash point non-flammable
PEL (U.S.) 0.005 mg/m3 (as CrO3)
Related compounds
Other anions Caesium molybdate
Other cations Lithium chromate
Sodium chromate
Potassium chromate
Rubidium chromate
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Caesium chromate is used to produce caesium vapour by reaction with silicon or boron, which is used to in the final stages of creating vacuum tubes; the caesium vapour reacts with the remaining gases, including nitrogen and oxygen.[4]

References

  1. CRC Handbook of Chemistry and Physics, 62nd ed.; Weast, Robert C., Ed.; CRC Press: Boca Raton, FL, 1981; p B-91. ISBN 0-8493-0462-8.
  2. Index no. 024-017-00-8 of Annex VI, Part 3, to Regulation (EC) No 1272/2008 of the European Parliament and of the Council of 16 December 2008 on classification, labelling and packaging of substances and mixtures, amending and repealing Directives 67/548/EEC and 1999/45/EC, and amending Regulation (EC) No 1907/2006. OJEU L353, 31.12.2008, pp 1–1355 at p 419.
  3. 29 CFR 1910.1026 (71 FR 10374, Feb. 28, 2006, as amended).
  4. Emsley, John Nature's Building Blocks: An A-Z Guide to the Elements; Oxford University Press: Oxford, 2001; p 81. ISBN 0198503407.

Further reading

  • Chromium and Chromium Compounds. In Chromium, Nickel and Welding; IARC Monographs on the Evaluation of Carcinogenic Risks to Humans 49; International Agency for Research on Cancer: Lyon, France, 1990; pp 49–446. ISBN 92-832-1249-5.

External links

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