1H-Tetrazole-5-acetic acid

CAS 21743-75-9C3H4N4O2Chemical Synthesis

1H-Tetrazole-5-acetic acid (CAS: 21743-75-9) is a heterocyclic organic compound with the molecular formula C3H4N4O2 and a molecular weight of 128.09 g/mol. This white to off-white solid serves as a valuable building block in chemical synthesis, particularly within the pharmaceutical and agrochemical sectors. Its tetrazole ring and carboxylic acid functionality offer versatile reaction sites for developing complex molecular structures.

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1H-Tetrazole-5-acetic acid (C3H4N4O2) — chemical structure, CAS 21743-75-9; Chemistry, fine chemical supplied by Tech Serve Solutions

Building BlocksChemical SynthesisHeterocyclic Building BlocksTetrazoles

01 /Applications

Pharmaceutical Intermediate

Used in the synthesis of active pharmaceutical ingredients (APIs) and drug discovery research, leveraging its heterocyclic structure for novel therapeutic agents.

Agrochemical Development

Incorporated into the development of new pesticides, herbicides, and fungicides, contributing to its efficacy and mode of action.

Organic Synthesis Building Block

Serves as a key synthon for constructing more complex organic molecules due to its reactive tetrazole and acetic acid moieties.

Material Science Research

Explored for potential applications in advanced materials and functional polymers requiring specific nitrogen-rich heterocyclic units.

02 /Properties

Molecular weight	128.09
Empirical formula	C3H4N4O2
Assay	96%
Melting point	180-183 °C(lit.)

03 /Safety & handling

GHS hazard pictogram: Harmful / irritant (GHS07) — Harmful / irritant

Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust, fume, gas or vapours
P305IF IN EYES

Protective equipment	dust mask type N95 (US), Eyeshields, Gloves
Water hazard class (WGK, DE)	3
Hazard codes (EU)	Xi
Risk statements (R)	36/37/38
Safety statements (S)	26-36

Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.

04 /Identifiers & registry

CAS number

21743-75-9

MDL number

MFCD03094010

PubChem substance

24878294

05 /Quality & supply

Documentation

Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.

Supply & logistics

Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.

06 /Frequently asked questions

What is 1H-Tetrazole-5-acetic acid primarily used for?

1H-Tetrazole-5-acetic acid is primarily used as a building block in chemical synthesis, particularly for developing pharmaceuticals and agrochemicals.

What is the CAS number and formula for 1H-Tetrazole-5-acetic acid?

The CAS number is 21743-75-9 and the empirical formula is C3H4N4O2.

What grade and purity does Tech Serve Solutions supply?

Tech Serve Solutions supplies 1H-Tetrazole-5-acetic acid with an assay of 96%. We do not represent this product as USP, BP, or EP grade.

How should 1H-Tetrazole-5-acetic acid be handled?

Handle 1H-Tetrazole-5-acetic acid with appropriate personal protective equipment, including a dust mask (type N95 US), eyeshields, and gloves. Ensure adequate ventilation to avoid inhaling dust (H335) and prevent skin (H315) and eye irritation (H319).