API Process Intermediates & Related Compounds

Monomethyl Phthalate

Name: Monomethyl Phthalate
Brand: Zemixal
SKU: ZX-035441

Available on request

Order Monomethyl Phthalate (CAS 4376-18-5) online at Zemixal: C9H8O4, COA and SDS with every lot, worldwide shipping. Catalogue no. ZX-035441.

Pack sizes

CAS number4376-18-5

FormulaC₉H₈O₄

Molar mass180.16 g/mol

Physical formSolid

InChIKeyFNJSWIPFHMKRAT-UHFFFAOYSA-N

IUPAC name2-methoxycarbonylbenzoic acid

About Monomethyl Phthalate

Researchers and plant chemists source Monomethyl Phthalate from Zemixal for routine and specialised work. Key data: CAS 4376-18-5, formula C9H8O4 and molar mass 180.16 g/mol. It is handled as a solid.

Use cases we see most often

API route development
Impurity fate & purge studies
Analytical method development
Fine chemical synthesis

Storage and safety notes

It carries the GHS signal word Warning (H315, H319 and H335), so wear gloves and eye protection and work with good ventilation.

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and custom quantities are quoted on request. You receive a batch certificate of analysis and a 16-section SDS with each order. Send an enquiry through the quote panel and you get a formal offer with Incoterms and delivery time.

Reference standards for Pharacine

See every impurity, metabolite and related compound we list for this API.

Pharacine standards

Typical uses

API route development
Impurity fate & purge studies
Analytical method development
Fine chemical synthesis

Applications

Pharmaceutical Manufacturing and QC Research Labs and Universities

Specifications and identifiers

Specifications of Monomethyl Phthalate
Product name	Monomethyl Phthalate
Catalogue number	ZX-035441
CAS number	4376-18-5
IUPAC name	2-methoxycarbonylbenzoic acid
Molecular formula	C₉H₈O₄
Molar mass	180.16 g/mol
Exact mass	180.0423
Physical form	Solid
XLogP3	1.1
H-bond donors / acceptors	1 / 4
Topological polar surface area	63.6 Å²
InChIKey	FNJSWIPFHMKRAT-UHFFFAOYSA-N
SMILES	COC(=O)C1=CC=CC=C1C(=O)O
PubChem CID	20392
Synonyms	2-(Methoxycarbonyl)benzoic acid, Methyl hydrogen phthalate, 1,2-Benzenedicarboxylic acid, monomethyl ester, o-(Methoxycarbonyl)benzoic acid, Phthalic acid, monomethyl ester, Monomethyl 1,2-benzenedicarboxylate, 1,2-benzenedicarboxylic acid monomethyl ester, Phthalic acid monomethyl ester, D 3 (ester), Phthalic acid, mono-methyl ester, Phthalic acid, methyl ester

Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.

Safety and GHS hazards

Irritant or harmful

Signal word Warning

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501

Classification summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.

Pack sizes

Pack sizes of Monomethyl Phthalate
10 mg	Quoted on request
25 mg	Quoted on request
50 mg	Quoted on request
100 mg	Quoted on request

Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.

Questions about Monomethyl Phthalate

Which CAS number identifies Monomethyl Phthalate?

Monomethyl Phthalate is registered under CAS 4376-18-5. You may also see it listed as 2-(Methoxycarbonyl)benzoic acid, Methyl hydrogen phthalate, 1,2-Benzenedicarboxylic acid, monomethyl ester. Our catalogue number for this item is ZX-035441.

What are the formula and molar mass of Monomethyl Phthalate?

For Monomethyl Phthalate, its formula is C9H8O4 and its molar mass is 180.16 g/mol. The systematic (IUPAC) name is 2-methoxycarbonylbenzoic acid. InChIKey FNJSWIPFHMKRAT-UHFFFAOYSA-N lets you match it in any structure database.

How is Monomethyl Phthalate used in pharmaceutical QC?

Monomethyl Phthalate is a characterised reference material linked to Pharacine. Laboratories use it to identify and quantify this impurity during method development and validation, stability work, batch release testing and regulatory submissions.

What grade and pack sizes are available for Monomethyl Phthalate?

The grade and assay are confirmed on the quotation and the batch COA. Standard packs are 10 mg, 25 mg, 50 mg, 100 mg. Larger quantities and custom packing can be quoted on request.

Which documents come with Monomethyl Phthalate?

Each lot ships with a batch certificate of analysis and a 16-section GHS safety data sheet. A typical COA or specification sheet can be shared with the quotation before you order.

Can Zemixal ship Monomethyl Phthalate to my country?

Yes. Because Monomethyl Phthalate is classed as hazardous, it travels in UN-approved packaging as dangerous goods under IATA or IMDG rules, with the export paperwork your broker needs.

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