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Potassium Dichromate 99.8% AR Grade Reagents

Cas Number:7778-50-9
Formula: K2Cr2O7
Molar Mass:294.18
EC Number:231-906-6

Quantity:
  • AR
  • LABOR
  • 218202129

This product is regulated and can only be purchased by authorized users.Please contact us for details.


Potassium Dichromate 99.8% AR Grade Reagents


Cas Number:7778-50-9

Formula: K2Cr2O7

Molar Mass:294.18

EC Number:231-906-6


Physicochemical properties:

Orange-red glossy crystalline particles or powder. Bitter. It is not hygroscopic or deliquescent (unlike sodium dichromate). When the intense heat is about 500 ° C, it is decomposed into chromium oxide and potassium chromate. It does not work when it is cooled in hydrochloric acid, and chlorine gas when it is hot. Dissolved in 10 parts of cold water or 1.25 parts of hot water, insoluble in ethanol, the aqueous solution is acidic. The relative density (d254) is 2.676. The melting point is 398 ° C (brown liquid).


Usage:

Benchmark the calibration of sodium thiosulfate standard solution. Drip analysis to determine chlorine. Oxidizer. Reagents for chromatography. Organic Synthesis. The liver function jaundice index is measured. Testing stools, etc.


Packing:

500g/25kg






Item of Analysis

Standard

Assay,%

99.8 min

Insoluble in water,%

0.005 max

Loss on drying,%

0.05 max

Chloride(Cl),%

0.002 max

Sulfate(SO4),%

0.01 max

Sodium(Na),%

0.05 max

Calcium(Ca),%

0.002 max

Iron(Fe),%

0.002 max


Symbol 

Signal word 

Danger

Hazard statement

H272


H301


H312


H314


H317


H330


H334


H340


H350


H360


H372


H410

Precautionary statements—Prevention

P201


P202


P210


P220


P221


P260


P264


P270


P271


P272


P273


P280


P284

Precautionary statements—Response

P301+P310+P330


P301+P330+P331


P303+P361+P353


P304+P340+P310


P305+P351+P338+P310


P308+P313


P333+P313


P362+P364


P370+P378


P391

Precautionary statements—Storage

P403+P233


P405

UN No.

3086

Hazard Class

6.1+5.1

Package Group

II

Flash point

No Information

Melting point

398℃




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