Basic information
- CAS
13454-78-9- Standard SMILES
[Cs+].[Cs+].[O]=[Cr](=[O])([O-])[O-]- InChIKey
BROHICCPQMHYFY-UHFFFAOYSA-N- Molecular formula
- CrCs2O4
- Average molar mass
- 381.805 g/mol
- Monoisotopic mass
- 381.73106978
Overview
Cesium chromate is a chemical compound of caesium and hexavalent chromium. It is used in creating vacuum tubes. Hexavalent chromium refers to chemical compounds that contain the element chromium in the +6 oxidation state. Chromium(VI) is more toxic than other oxidation states of the chromium atom because of its greater ability to enter cells and higher redox potential. (L16, L18)
Names & identifiers
- Preferred name
- Cesium chromate (Cs2CrO4)
- IUPAC
- dicesium;dioxido(dioxo)chromium
- English name
- CESIUM CHROMATE
- Molecular formula
- CrCsH3O4
- Molecular weight
- 251.92
Names & synonyms
13454-78-9Chromic acid (H2CrO4), dicesium saltEINECS 236-640-4DTXSID20894903RefChem:124636DTXCID201324461Cesium chromate (Cs2CrO4)Cesium chromate56320-90-2Dicesium chromateCESIUM CHROMATE 99.9+%dicesium;dioxido(dioxo)chromium
Show more names
CaesiumchromateCesium chromate(VI)Chromicacid,dicesiumsaltChromicacid(H2CrO4)dicesiumsaltchromicacid(h2cro4),dicesiumsaltCesiumchromate,99.9%(metalsbasis)Cesium chromate, 99.9% trace metals basis
MFCD00016050CESIUM CHROMATE, 99.9%Cs2CrO4Chromic acid cesium saltSCHEMBL406339small es, Cyrillicaesium chromateDicaesium tetrakis(oxido)chromate(2-)small es, Cyrillichromic acid cesium salt
Database identifiers
- CAS
13454-78-9、56320-90-2- PubChem CID
- 61613
- DTXSID
DTXSID20894903
Properties
Computed structural properties
- Topological polar surface area
- 80.3 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 4
- Rotatable bonds
- 0
- Heavy atoms
- 7
- Formal charge
- 0
- Complexity
- 62.2
Experimental & physicochemical properties
Chemical ClassesMetals -> Chromium Compounds, Inorganic
Physical DescriptionYellow odorless powder; Soluble in water; [MSDSonline]
Physicochemical properties
- form
- Powder
- Water Solubility
- Soluble in water.
- Sensitive
- Hygroscopic
- Exposure limits
- 0.1 mg/m3NIOSH: · OSHA: Ceiling 0.1 mg/m3NIOSH: IDLH 15 mg/m3; TWA 0.0002 mg/m3
- InChI
- 1S/Cr.2Cs.4O/q;2*+1;;;2*-1
- InChIKey
- BROHICCPQMHYFY-UHFFFAOYSA-N
- SMILES
- [Cs+].[Cs+].[O-][Cr]([O-])(=O)=O
- CAS DataBase Reference
- 13454 · 13454-78-9(CAS DataBase Reference)
- EPA Substance Registry System
- Chromic acid (H2CrO4), dicesium salt (13454-78-9)
- UNSPSC Code
- 12352302 · 12352302
- NACRES
Safety & regulation
GHS classification
GHS Classification
Danger
H272 (94.4%): May intensify fire; oxidizer [Danger Oxidizing liquids; Oxidizing solids]
P203, P210, P220, P261, P264, P264+P265, P271, P272, P273, P280, P302+P352, P304+P340, P305+P351+P338, P318, P319, P321, P332+P317, P333+P317, P337+P317, P362+P364, P370+P378, P391, P403+P233, P405, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 72 reports by companies from 5 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Danger
H272 (88.4%): May intensify fire; oxidizer [Danger Oxidizing liquids; Oxidizing solids]
Hazard information
Hazards Summary
CrVI compounds are irritants, sensitizers, and may be corrosive to the skin. CrVI compounds are respiratory tract irritants and may cause pulmonary sensitization. CrVI may cause acute tubular necrosis and liver injury. [ATSDR Case Studies] May cause fire in contact with combustible material; A corrosive substance that can cause injury to the skin, eyes, and respiratory tract; May cause skin sensitization; [MSDSonline] See Chromium and linked occupational diseases.
Hazard Classes and Categories
Ox. Sol. 2 (94.4%)
Ox. Sol. 2 (88.4%)
Safety & protection
Exposure Control and Personal ProtectionBiological Exposure Indices (BEI) [ACGIH] - For chromium (VI), water-soluble fume: Total Cr in urine = 10 ug/L (increase during shift) or 25 ug/L (end of shift at end of workweek)
Minimum Risk LevelIntermediate Oral: 0.005 mg/kg/day (L134)
Chronic Oral: 0.001 mg/kg/day (L134)
Threshold Limit Values (TLV)
Chemistry & industry
Pharmacology
Metabolism/Metabolites
Chromium is absorbed from oral, inhalation, or dermal exposure and distributes to nearly all tissues, with the highest concentrations found in kidney and liver. Bone is also a major storage site and may contribute to long-term retention. Hexavalent chromium's similarity to sulfate and chromate allow it to be transported into cells via sulfate transport mechanisms. Inside the cell, hexavalent chromium is reduced first to pentavalent chromium, then to trivalent chromium by many substances including ascorbate, glutathione, and nicotinamide adenine dinucleotide. Chromium is almost entirely excreted with the urine. (A12, L16)
Uses & manufacturing
UsesCaesium chromate is used in creating vacuum tubes. (L18)
General Manufacturing InformationChromic acid (H2CrO4), cesium salt (1:2): ACTIVE
Applications
UsesCesium chromate is used to produce cesium vapor by reaction with silicon, boron, or titanium, which is used in the final stages of creating vacuum tubes. It is used in the production of photo-tubes.
Suppliers23 total
上海莉凯化工技术有限公司16628776521 · [email protected]
武汉易泰科技有限公司上海分公司18930552037 · [email protected]
阿法埃莎（中国）化学有限公司400-6106006 · [email protected]
安耐吉化学&3A（安徽泽升科技股份有限公司）400-0056266 · [email protected]
Related reactions
2 records
Compound notes
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