Acetylenedicarboxylic Acid

Name: Acetylenedicarboxylic Acid
Brand: Vaqora Chemicals
SKU: VQ-050331

About Acetylenedicarboxylic Acid

Acetylenedicarboxylic Acid is a process intermediate or related compound of N methylpyrrolidone carrying the CAS registry number 142-45-0. The compound has the formula C4H2O4, corresponding to a molecular weight of 114.06 g/mol. Systematically, it is named but-2-ynedioic acid. Alternative names: 2-butynedioic acid and Butynedioic acid.

It is supplied as a solid. Keep the vial tightly closed, protected from light and humidity, at the temperature stated on the Certificate of Analysis. Under GHS it is labelled “Danger”, so handle it with suitable PPE and consult the SDS.

Process chemists and analysts use it when developing synthetic routes to N methylpyrrolidone, tracking process-related impurities and validating analytical methods. It is used across pharmaceutical manufacturing and academic and industrial research.

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

API route development
Impurity fate & purge studies
Analytical method development

Industries

Related to N methylpyrrolidone

View every impurity, metabolite and intermediate we list for N methylpyrrolidone.

N methylpyrrolidone impurities

Specifications & identifiers

Chemical identifiers
Product name	Acetylenedicarboxylic Acid
Catalogue No.	VQ-050331
CAS Number	142-45-0
IUPAC name	but-2-ynedioic acid
Molecular formula	C₄H₂O₄
Molecular weight	114.06 g/mol
Exact mass	113.9953
InChIKey	YTIVTFGABIZHHX-UHFFFAOYSA-N
SMILES	C(#CC(=O)O)C(=O)O
PubChem CID	371

Physical properties
Physical form	Solid
LogP (XLogP3)	0.1
H-bond donors / acceptors	2 / 4
TPSA	74.6 Å²
Synonyms	2-butynedioic acid, Butynedioic acid, acetylenedicarboxylate, 2-Butyne-1,4-dioic acid, 2-ButynedioicAcid, Acetylendicarboxylate, acetylene dicarboxylic, AcetylendicarbonsA currencyure, Acetylenedicarboxylic acid (8CI)

Safety & hazard information (GHS)

Corrosive

Toxic

Harmful / irritant

Signal word: Danger

Hazard statements

H301Toxic if swallowed
H311Toxic in contact with skin
H314Causes severe skin burns and eye damage
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P260, P261, P262, P264, P264 + P265, P270, P271, P280, P301 + P316, P301 + P330 + P331, P302 + P352, P302 + P361 + P354, P304 + P340, P305 + P351 + P338, P305 + P354 + P338, P316, P319, P321, P330, P332 + P317, P337 + P317, P361 + P364, P362 + P364, P363

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of Acetylenedicarboxylic Acid?

The CAS Registry Number of Acetylenedicarboxylic Acid is 142-45-0. It is also known as 2-butynedioic acid, Butynedioic acid, acetylenedicarboxylate.

What is the molecular formula and molecular weight of Acetylenedicarboxylic Acid?

Acetylenedicarboxylic Acid has the molecular formula C4H2O4 and a molecular weight of 114.06 g/mol. Its IUPAC name is but-2-ynedioic acid.

What is Acetylenedicarboxylic Acid used for?

Acetylenedicarboxylic Acid is supplied as a characterised reference material related to N methylpyrrolidone. It is used for analytical method development and validation (AMV), impurity profiling, stability studies and quality control, and in ANDA/DMF regulatory filings.

Which grade and pack sizes of Acetylenedicarboxylic Acid can I order?

We supply Acetylenedicarboxylic Acid, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Acetylenedicarboxylic Acid?

Yes. Every lot of Acetylenedicarboxylic Acid is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Acetylenedicarboxylic Acid be shipped internationally?

Yes. Acetylenedicarboxylic Acid is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.