| Company Name: |
Alfa Aesar
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| Tel: |
1 888 343-8025 Specialty/Bulk |
| Email: |
tech@alfa.com |
| Products Intro: |
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| Company Name: |
GFS Chemicals
|
| Tel: |
800 858-9682 (U.S. & Canada) |
| Email: |
gfschem@gfschemicals.com |
| Products Intro: |
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| Company Name: |
Cerilliant Corporation
|
| Tel: |
800 848 7837 (US and Canada) |
| Email: |
techserv@cerilliant.com |
| Products Intro: |
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| Company Name: |
VWR International
|
| Tel: |
800 932 5000 |
| Email: |
solutions@vwr.com |
| Products Intro: |
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| | DICHROMATE Basic information |
| Product Name: | DICHROMATE | | Synonyms: | Dichromate, Ion chromatography standard solution, Specpure, Cr2O7- 1000g/ml;DICHROMATE;DICHROMATE ION CHROMATOGRAPHY STANDARD;DICHROMATE, ION CHROMATOGRAPHY STANDARD SOLUTION;Dichromate, Ion chromatography standard solution, Specpure(R), Cr2O7-2 1000μg/ml;Dichromate, Ion chromatography standard solution, Specpure , Cr{2}O{7}|- 1000 g/ml;Dichromate, Ion chromatography standard solution, Cr | | CAS: | | | MF: | Cr2O7-2 | | MW: | 215.988 | | EINECS: | | | Product Categories: | | | Mol File: | Mol File |  |
| | DICHROMATE Chemical Properties |
| form | Liquid | | Exposure limits | ACGIH: TWA 0.0002 mg/m3; STEL 0.0005 mg/m3 (Skin)
OSHA: Ceiling 0.1 mg/m3
NIOSH: IDLH 15 mg/m3; TWA 0.0002 mg/m3 |
| Provider | Language |
|
ALFA
| English |
| | DICHROMATE Usage And Synthesis |
| Industrial uses | This is an orange, crystalline substance with a specific gravity of 2.68. Solubility in water is
11.7% at 20 °C. Both potassium and sodium dichromate are used in mineral processing.Dichromate solutions have an acid reaction because Cr2O72- ion reacts with water as follows:
H2O + Cr2O72- ? HCr2O4- + H+ + CrO4-
Salts of chromic acid in acid medium are oxidants (Cr4- changes to Cr3- ). In principle,
dichromates are used in selective separation of copper–lead bulk concentrates, usually in
acid pH. A mixture of sodium dichromate and sodium silicate has shown to be an excellent
lead depressant during copper flotation from a bulk copper–lead concentrate containing
secondary copper minerals. |
| | DICHROMATE Preparation Products And Raw materials |
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