Methyl Paraben (Methyl 4-hydroxybenzoate)

Methyl Paraben (Methyl 4-hydroxybenzoate), ACS Grade
Product Name: Methyl Paraben
Synonyms: Methyl 4-hydroxybenzoate, p-Hydroxybenzoic acid methyl ester
Grade: ACS / Laboratory Reagent
Packaging (Typical): 100 g / 250 g / 500 g (HDPE bottle)

Brand Reference: ACS Chemicals / LobaChemie Equivalent Standard
Chemical Identity
CAS Number: 99-76-3
Molecular Formula: C₈H₈O₃
Molecular Weight: 152.15 g/mol
Chemical Class: Paraben ester (preservative compound)

Description
White crystalline powder or colorless crystals with faint characteristic odor. Methyl Paraben is widely used as an antimicrobial preservative due to its effectiveness against fungi and some bacteria, especially in acidic to neutral pH systems.

Applications
Preservative in pharmaceuticals (syrups, suspensions, ointments)
Cosmetic formulations (creams, lotions, shampoos)
Food and beverage preservation (regulated use)
Laboratory reagent and analytical standard
Personal care and industrial formulations

Specifications (Typical – ACS / Supplier Benchmarks)
Appearance: White crystalline powder
Assay: ≥ 99.0%
Melting Point: 125 – 128°C
Sulphated Ash: ≤ 0.1%
Free Acid: Passes test
Heavy Metals: ≤ 10 ppm
Loss on Drying: ≤ 0.5%
Solubility
Slightly soluble in water
Freely soluble in alcohol, ether, acetone
Soluble in propylene glycol

Handling & Storage
Store in tightly closed container
Keep in a cool, dry, well-ventilated area
Protect from moisture and heat
Avoid contamination during handling

Hazard Information
Low acute toxicity
May cause mild skin or eye irritation
Avoid inhalation of dust
Use standard PPE (gloves, goggles, lab coat)

Packaging
High-density polyethylene (HDPE) container
Screw cap with tamper seal
Suitable for laboratory and industrial use

Safety Note
Handle according to standard laboratory safety procedures. Refer to SDS for detailed toxicological, ecological, and regulatory information.