Propylene Glycol USP Grade

USP Grade

Certificate #: TYP-PROPYLENEGLY
Lot Number: TYPICAL SAMPLE
Test Date: 2026-07-17
Category: Glycerin & Food/FCC Organics (H)
CAS Number: 57-55-6
Formula: C3H8O2
Computed Assay: 99.90%(100 − Σ impurities)

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Sample COA. Lot-specific COAs ship with each order.

2D chemical structure of Propylene Glycol USP Grade — Structure · PubChem

Last reviewed 2026-05-20.

COA · Answer summary

Typical certificate of analysis for Propylene Glycol USP Grade. Lot-specific results ship with every order.

Assay (computed): 99.90%
Grade: USP Grade

Specifications

Parameter	Specification	Typical Result	Test Method
Assay (GC/Density)	99.5 – 100.5 %	99.9 %	GC or density
Arsenic (As)	≤ 1.5 ppm	0.5 ppm	ICP-MS
Chlorides	≤ 1 ppm	0 ppm	Ion chromatography
Color (APHA)	≤ 10 APHA	3 APHA	APHA
Heavy Metals (Pb)	≤ 5 ppm	1 ppm	ICP
Lead (Pb)	≤ 0.5 ppm	0.2 ppm	ICP-MS
Specific Gravity @20°C	1.033 – 1.039 g/mL	1.04 g/mL	Hydrometer @ 25°C
Sulfates	≤ 5 ppm	2 ppm	Ion chromatography
Water (Karl Fischer)	≤ 0.2 %	0.1 %	Karl Fischer

Generated 2026-07-17. Published by Alliance Chemical from first-party canonical product data. Our authority is hands-on chemical handling, DOT/GHS-compliant shipping, and government-registered distribution — not bench chemistry. Values are representative of typical production lots and reflect the published specification range. Lot-specific COAs are provided with every shipment.