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