Methylene Glycol

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Product Description

Methylene Glycol is a chemical compound formed by the reversible reaction of formaldehyde with water. It exists in equilibrium with formaldehyde in aqueous solutions and is commonly used as a disinfectant, preservative, and industrial biocide. Due to its antimicrobial properties, it is widely applied in water treatment, cosmetics, and embalming fluids.

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Categories: COSMETIC AND PERSONAL CARE CHEMICALS, SPECIALTY AND FINE CHEMICALS Tags: Cosmetic Raw Material, Formaldehyde releaser, Hair straightening agent, Methylene Glycol

Description

Table of Contents

Primary Uses

Disinfection & Sanitization
- Used in water treatment systems to control microbial growth.
- Effective in disinfecting medical equipment and surfaces.
- Applied in cooling tower treatments to prevent biofouling.
Preservation
- Acts as a preservative in cosmetics and personal care products.
- Extends shelf life of industrial fluids (e.g., metalworking fluids).
- Used in embalming fluids for tissue fixation.
Industrial Biocide
- Prevents bacterial and fungal growth in paper/pulp manufacturing.
- Used in oilfield operations to inhibit microbial contamination.
- Treats wastewater to reduce organic load and pathogens.

Secondary Uses

Textile Industry
- Prevents mildew in fabrics during storage and shipping.
- Used in dye fixation processes.
Laboratory Applications
- Acts as a fixative in histology and pathology samples.
- Used in formaldehyde-releasing reagent formulations.
Agriculture
- Seed treatment to prevent fungal infections.
- Soil sterilization in greenhouse cultivation.

KEY PRODUCT FEATURES

Key Attributes

Basic Identification Attributes

Chemical Name (IUPAC): Methanediol
Common/Trade Name: Methylene Glycol
CAS Number: 463-57-0
HS Code: 2912.11.00 (Formaldehyde derivatives)
Synonyms: Formaldehyde hydrate; Formalin (aqueous solution)

Physical & Chemical Properties

Physical State: Liquid (in aqueous solution)
Color & Odor: Colorless; pungent formaldehyde-like odor
pH: ~3.5–5.5 (in solution)
Solubility: Fully miscible with water
Density: ~1.08–1.09 g/cm³ (37% solution)

Safety & Hazard Attributes

GHS Classification:
- H301 (Toxic if swallowed)
- H311 (Toxic in contact with skin)
- H314 (Causes severe skin burns and eye damage)
- H317 (May cause allergic skin reaction)
- H331 (Toxic if inhaled)
- H341 (Suspected of causing genetic defects)
- H350 (May cause cancer)
Toxicity: Highly toxic; carcinogenic and mutagenic potential
Exposure Limits:
- OSHA PEL (Formaldehyde): 0.75 ppm (TWA)
- ACGIH TLV: 0.3 ppm (Ceiling)

Storage & Handling Attributes

Storage Conditions:
- Store in sealed, corrosion-resistant containers.
- Keep in a cool, ventilated area away from heat/oxidizers.
Container Type: Polyethylene or stainless-steel containers.
Shelf Life: 6–12 months (stabilized solutions).
Handling Precautions:
- Use PPE (gloves, goggles, respirator).
- Avoid inhalation or skin contact.

Regulatory & Compliance Attributes

Complies with:
- EPA FIFRA (biocidal applications).
- EU REACH (restricted under Annex XVII).
- FDA (limited use in cosmetics).
Restrictions: Banned in consumer products in some regions (e.g., EU cosmetics).

Environmental & Health Impact

Biodegradability: Readily biodegradable (forms formaldehyde).
Ecotoxicity: Toxic to aquatic life (LC50 < 10 mg/L).
Bioaccumulation: Low potential.
Carcinogenicity/Mutagenicity:
- IARC Group 1 (Formaldehyde: carcinogenic to humans).

SAFETY HANDLING PRECAUTIONS

Safety Handling Precautions

PPE Required:
- Nitrile/neoprene gloves, chemical goggles, respirator (organic vapor cartridge).
Handling Guidelines:
- Use in fume hoods or well-ventilated areas.
- Prohibit eating/drinking near handling areas.
Storage Measures:
- Separate from amines, strong acids, and oxidizers.