1. Propylene Glycol Industrial grade
Molecular Weight: 76.095
TESTS
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INDUSTRIAL GRADE SPECIFICATIONS
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Description/Appearance
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Colorless, viscous, clear hygroscopic liquid
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Identification
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IR test
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Assay (Purity)
|
99% min
|
Specific gravity
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1.037 1.039 g/cm3 at 25 °C
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Index of refraction
|
1.431 1.433 nD20
|
Acidity
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≤ 0.20 ml of 0.10 N NaOH
|
sas Cl-
|
10ppm
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Water/Moisture
|
0.2% max
|
Residue on ignition
|
0.01%
|
Distillation range
|
180-190
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Color
|
15 APHA
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Heavy metals
|
6 ppm max
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Oxidizing substances
|
Not required
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Reducing substances
|
Not required
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2. Propylene Glycol USP grade
Molecular Weight: 76.095
TESTS
|
USP SPECIFICATIONS
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Description/
Appearance
|
Colorless, viscous, clear hygroscopic liquid without odor
|
Identification
|
IR test
|
Assay (Purity)
|
99.5% min
|
Specific gravity
|
1.035 1.037 g/cm3 at 25 °C
|
Index of refraction
|
1.431 1.433 nD20
|
Acidity
|
≤ 0.20 ml of 0.10 N NaOH
|
Water/Moisture
|
0.2% max
|
Residue on ignition
|
4.0 mg max
|
Chloride
|
5 ppm max
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Heavy metals(as Pb)
|
5 ppm max
|
sas SO42-
|
10 ppm max
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Oxidizing substances
|
Not required
|
Arsenic
|
5 ppm max
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Reducing substances
|
Not required
|
Organic volatile impurities
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A.Chloroform: 60 ppm
B.1,4-dioxane: 400 ppm
C. Methylene chloride: 600 ppm
D.Trichloroethylene: 100 ppm
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|