Item

Index

Top grade

First grade

Qualified product

Chroma (platinum-cobalt color number) ≤

5

10

Density (20 ℃), g / cm³

0.791 ～ 0.792

0.791 ～ 0.793

Temperature range (0 ℃, 101325Pa), ℃
Boiling range (including 64.6 ± 0.1 ℃), ℃ ≤

64.0 ～ 65.5

0.8

1.0

1.5

Potassium permanganate test, min ≥

50

30

20

Water miscibility test

Pass the experiment (1 + 3)

Pass the experiment (1 + 9)

-

Moisture,% ≤

0.01

0.15

-

Acidity (as HCOOH),% ≤

0.001 5

0.003 0

0.005 0

Alkalinity (as NH 3),% ≤

0.000 2

0.000 8

0.0001 5

Content of carbonyl compound (based on CH₂O),% ≤

0.002

0.005

0.010

Content of Residue on Evaporation,% ≤

0.001

0.003

0.005

Sulfuric acid washing experiment / Hazen unit (platinum-cobalt color number)

50

50

Mass fraction of ethanol%

negotiable