What is Propylene Glycol Monomethyl Ether CAS 107-98-2?

CAS 107-98-2 is propylene glycol monomethyl ether, also known as 1-methoxy-2-propanol, PGME, or PM. It is a colorless glycol ether solvent with the molecular formula C4H10O2 and contains both ether and alcohol functional groups.

What are the key physical properties of PGME?

PGME is a colorless liquid with a faint ether-like odor, a boiling point near 120 degrees C, and a closed-cup flash point around 31 degrees C. It is miscible with water and many organic solvents and has a moderate evaporation rate.

How is PGME used in coatings and inks?

In coatings it works as an active solvent and coupling agent for water-based paints, alkyd resins, nitrocellulose lacquers, and automotive coatings. In inks it helps dissolve resins and improves flow, leveling, and film formation.

What cleaning and electronic applications use Propylene Glycol Monomethyl Ether?

PGME is used in household and industrial cleaners, rust removers, glass cleaners, and hard-surface cleaners because it couples water with organic soils. Higher-purity electronic grades are also used for cleaning LCDs and other sensitive electronic components.

How should Propylene Glycol Monomethyl Ether CAS 107-98-2 be stored?

Store PGME in tightly closed containers in a cool, dry, ventilated area away from heat, sparks, open flames, and oxidizing agents. Because it is flammable and volatile, grounding and proper ventilation should be used during transfer and handling.

Propylene Glycol Monomethyl Ether CAS 107-98-2

Propylene Glycol Monomethyl Ether (CAS 107-98-2) is a colorless, highly volatile synthetic organic liquid featuring both ether and alcohol functional groups, serving as a versatile medium-boiling carrier within the broader category of Solvents. The acetate counterpart Propylene Glycol Monomethyl Ether Acetate (PGMEA) is a related coating solvent where a slower evaporation profile is specified. Operating as an advanced, low-toxicity PGME matrix, this bifunctional 1-methoxy-2-propanol exhibits exceptional solvency for both polar and non-polar substances, making the propylene glycol methyl ether integral to formulating advanced industrial coatings, flexographic printing inks, and agricultural chemical suspensions. Its balanced evaporation rate provides excellent flow and leveling properties when deployed as a fundamental PM solvent or active methoxypropanol coupling agent in demanding surface treatment and electronic cleaning environments. To support large-scale continuous manufacturing schedules, our facility maintains extensive bulk supply capabilities, ensuring consistent high-purity distillation with customized specifications to meet precise moisture and acidity parameters, all backed by competitive factory pricing and comprehensive technical documentation including MSDS, TDS, COA.

CAS: 107-98-2
Synonyms: PGME, 1-Methoxy-2-propanol, Propylene glycol methyl ether, PM solvent, Methoxypropanol
Einecs: 203-539-1
Molecular Formula: C4H10O2
Grade: Industrial Grade
Package: 190kg/iron drum, 950kg/IBC tank, ISO Tank

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Product Description

Technical Data

Physicochemical Properties	Standard Specification (Industrial High-Purity Grade)
Appearance	Colorless transparent liquid
Purity (1-Methoxy-2-propanol)	≥ 99.5%
2-Methoxy-1-propanol (Beta Isomer)	≤ 0.4%
Moisture / Water Content	≤ 0.1%
Acidity (as Acetic Acid)	≤ 0.01%
Color (Pt-Co)	≤ 10
Specific Gravity (20/20°C)	0.918 – 0.924
Distillation Range	117.0 – 125.0 °C

Applications

Industrial Coatings & Paints: Functions as a highly active solvent and coupling agent for water-reducible and solvent-based acrylic, epoxy, and polyurethane coatings, significantly improving film flow and leveling characteristics.
Printing Inks: Utilized as a fast-evaporating carrier fluid in flexographic and gravure printing inks to precisely regulate drying times and prevent screen clogging during high-speed printing operations.
Electronic & Industrial Cleaning: Applied as an effective degreaser and flux remover in semiconductor and PCB manufacturing due to its low surface tension, low toxicity, and high residue dissolution capacity.

For water-reducible coating, ink, or cleaner systems requiring a different glycol-ether coalescent, Ethylene Glycol Tert-Butyl Ether is a separate solvent option.

Storage & Safety

Storage Conditions: Store in a cool, dry, and well-ventilated warehouse environment away from direct sunlight, open flames, and strong oxidizers. Because it is a flammable liquid (Flash point ~31°C), containers must be kept tightly closed and electrically grounded to prevent static accumulation.
Safety & Handling: Industrial handling requires explosion-proof local exhaust ventilation. Operators must utilize chemical-resistant butyl rubber gloves, splash-proof safety goggles, and organic vapor respirators to prevent eye irritation and prolonged inhalation of volatile solvent vapors.

Quality Assurance

Our solvent distillation facility operates under strict ISO 9001 quality management protocols. Every production batch undergoes rigorous Gas Chromatography (GC) analysis to verify organic purity and ensure the beta-isomer (2-methoxy-1-propanol) remains strictly controlled below safe industrial limits. We continuously monitor trace moisture via automated Karl Fischer titration and assess acidity levels to guarantee the solvent complies fully with stringent international coating and electronic manufacturing specifications.

FAQ - Technical & Supply Chain

Q:
What is Propylene Glycol Monomethyl Ether CAS 107-98-2?

A: CAS 107-98-2 is propylene glycol monomethyl ether, also known as 1-methoxy-2-propanol, PGME, or PM. It is a colorless glycol ether solvent with the molecular formula C4H10O2 and contains both ether and alcohol functional groups.
Q:
What are the key physical properties of PGME?

A: PGME is a colorless liquid with a faint ether-like odor, a boiling point near 120 degrees C, and a closed-cup flash point around 31 degrees C. It is miscible with water and many organic solvents and has a moderate evaporation rate.
Q:
How is PGME used in coatings and inks?

A: In coatings it works as an active solvent and coupling agent for water-based paints, alkyd resins, nitrocellulose lacquers, and automotive coatings. In inks it helps dissolve resins and improves flow, leveling, and film formation.
Q:
What cleaning and electronic applications use Propylene Glycol Monomethyl Ether?

A: PGME is used in household and industrial cleaners, rust removers, glass cleaners, and hard-surface cleaners because it couples water with organic soils. Higher-purity electronic grades are also used for cleaning LCDs and other sensitive electronic components.
Q:
How should Propylene Glycol Monomethyl Ether CAS 107-98-2 be stored?

A: Store PGME in tightly closed containers in a cool, dry, ventilated area away from heat, sparks, open flames, and oxidizing agents. Because it is flammable and volatile, grounding and proper ventilation should be used during transfer and handling.

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