NMP

n-Methyl-2-pyrrolidone

Physical properties

 

Items

Unit

Specifications

1

Color, APHA

-

20

2

Specific gravity(25)

-

1.027 ~ 1.030

3

Water

%

0.05

4

Purity

%

99.9

5

Distillation range (198-203, vol%)

-

95

6

Reflective index

-

1.465 ~ 1.470

7

pH

-

7 ~ 8

8

Fe

ppb

50

9

Ni

ppb

50

10

Cu

ppb

30

11

Al

ppb

100

12

Cr

ppb

30

13

Pb

ppb

100

14

Zn

ppb

100

15

Ca

ppb

50

16

Ma

ppb

30

17

Na

ppb

30

18

K

ppb

30

19

NMP substituted by methyl group at carbon atom

ppm

100