5-Chloromethyl-2H-1,2,4-triazolin-3-one

Name: 5-Chloromethyl-2H-1,2,4-triazolin-3-one
Brand: Vaqora Chemicals
SKU: VQ-039365

About 5-Chloromethyl-2H-1,2,4-triazolin-3-one

5-Chloromethyl-2H-1,2,4-triazolin-3-one (CAS 252742-72-6) is an azole building block offered by Vaqora Chemicals. The compound has the formula C3H4ClN3O, corresponding to a molecular weight of 133.54 g/mol. Systematically, it is named 3-(chloromethyl)-1,4-dihydro-1,2,4-triazol-5-one. Common synonyms include 3-(Chloromethyl)-1H-1,2,4-triazol-5(4H)-one and 3-(Chloromethyl)-1,2,4-triazolin-5-one.

Store sealed in a dry, well-ventilated location away from incompatible materials. The GHS classification uses the signal word “Danger”, so appropriate gloves, eye protection and ventilation are recommended.

It is commonly used for organic synthesis and API synthesis. Buyers come mainly from pharmaceutical manufacturing, academic and industrial research and agrochemical production.

Standard pack sizes are 100 mg, 250 mg, 1 g and 5 g, and every batch ships with a Certificate of Analysis (COA) and we export worldwide. SDS and detailed specification sheets can be requested with your quotation.

Typical applications

Organic synthesis
API synthesis

Industries

Specifications & identifiers

Chemical identifiers
Product name	5-Chloromethyl-2H-1,2,4-triazolin-3-one
Catalogue No.	VQ-039365
CAS Number	252742-72-6
IUPAC name	3-(chloromethyl)-1,4-dihydro-1,2,4-triazol-5-one
Molecular formula	C₃H₄ClN₃O
Molecular weight	133.54 g/mol
Exact mass	133.0043
HSN code	2933
InChIKey	ZLRBJVJEQXBAAI-UHFFFAOYSA-N
SMILES	C(C1=NNC(=O)N1)Cl
PubChem CID	135546685

Physical properties
Physical form	Other
LogP (XLogP3)	-0.2
H-bond donors / acceptors	2 / 2
TPSA	53.5 Å²
Synonyms	5-Chloromethyl-2,4-dihydro-[1,2,4]triazol-3-one, 3H-1,2,4-Triazol-3-one, 5-(chloromethyl)-1,2-dihydro-, 5-(chloromethyl)-1,2-dihydro-3H-1,2,4-Triazol-3-one, 5-(chloromethyl)-2,4-dihydro-3H-1,2,4-triazol-3-one, 3-(Chloromethyl)-1H-1,2,4-triazol-5(4H)-one, 5-(chloromethyl)-1,2-dihydro-1,2,4-triazol-3-one, 3-(Chloromethyl)-1,2,4-triazolin-5-one, 3-Chloromethyl-1,2,4,-triazolin-5-one, 5-Chloromethyl-2h-[1,2,4]triazol-3-ol, 5-(chloromethyl)-4H-1,2,4-triazol-3-ol, 5-chloromethyl-2,4-dihydro-1,2,4-triazol-3-one

Safety & hazard information (GHS)

Corrosive

Harmful / irritant

Health hazard

Signal word: Danger

Hazard statements

H290May be corrosive to metals
H302Harmful if swallowed
H314Causes severe skin burns and eye damage
H318Causes serious eye damage
H319Causes serious eye irritation
H335May cause respiratory irritation
H341Suspected of causing genetic defects
H351Suspected of causing cancer

Precautionary statements: P203, P234, P260, P261, P264, P264 + P265, P270, P271, P280, P301 + P317, P301 + P330 + P331, P302 + P361 + P354, P304 + P340, P305 + P351 + P338, P305 + P354 + P338, P316, P317, P318, P319, P321, P330, P337 + P317, P363, P390

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 5-Chloromethyl-2H-1,2,4-triazolin-3-one?

The CAS Registry Number of 5-Chloromethyl-2H-1,2,4-triazolin-3-one is 252742-72-6. It is also known as 5-Chloromethyl-2,4-dihydro-[1,2,4]triazol-3-one, 3H-1,2,4-Triazol-3-one, 5-(chloromethyl)-1,2-dihydro-, 5-(chloromethyl)-1,2-dihydro-3H-1,2,4-Triazol-3-one.

What is the molecular formula and molecular weight of 5-Chloromethyl-2H-1,2,4-triazolin-3-one?

5-Chloromethyl-2H-1,2,4-triazolin-3-one has the molecular formula C3H4ClN3O and a molecular weight of 133.54 g/mol. Its IUPAC name is 3-(chloromethyl)-1,4-dihydro-1,2,4-triazol-5-one.

Which grade and pack sizes of 5-Chloromethyl-2H-1,2,4-triazolin-3-one can I order?

We supply 5-Chloromethyl-2H-1,2,4-triazolin-3-one, in 100 mg, 250 mg, 1 g, 5 g packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with 5-Chloromethyl-2H-1,2,4-triazolin-3-one?

Yes. Every lot of 5-Chloromethyl-2H-1,2,4-triazolin-3-one 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 5-Chloromethyl-2H-1,2,4-triazolin-3-one be shipped internationally?

Yes. 5-Chloromethyl-2H-1,2,4-triazolin-3-one 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.