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SPECIFICATION FOR BENZENE

Sr. No. CHARACTERISTICS Test Method GRADE 1 GRADE 2
1 Colour 5 of IS : 82-1973 Not darker than a freshly prepared solution of 0.8 ml of 0.1 N potassium dichromate and 12 ml of 0.1 N cobalt sulphate made up to 1000 ml with water

2

Relative Density at      
  15 deg /15 0C 6.3.3 of IS 82-1973 0.877 to 0.884 0.872 to 0.882
  27 deg/27 0C - 0.866 to 0.873 0.861 to 0.871

3

Range on evaporation mg/100 ml max. 8 of IS : 82 - 1973 5 5

4

Total sulphur, percent by mass, max. - 0.015 0.1

5

Hydrogen sulphide - To pass test 0.1

6

Mercaptans P-19 of IS:1448 Shall give no positive reaction Shall give no positive reaction

7

Thiophene (as sulphur), percent by mass, max. - 0.005 -

8

Crystallizing point, min. - 5.2 deg C -