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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

Dichloroacetonitrile | CAS 3018-12-0

A two-carbon haloacetonitrile examined as a drinking-water disinfection by-product and analytical target, where reagent purity, calibration value and solution composition must be specified as separate purchasing requirements.

CAS3018-12-0
Molecular formulaC2HCl2N
Molecular weight109.94 g/mol

Product overview

The molecule contains a dichloromethyl group bonded directly to a nitrile. It has neither an alkene nor a carbonyl group, distinguishing it from chloroacrylonitriles and dichloroacetic acid. Its principal documented analytical context is the measurement of halogenated disinfection by-products. EPA Method 551.1 includes dichloroacetonitrile among its target compounds. Procurement should distinguish neat reagent from a prepared reference solution and state whether an assigned concentration or purity value is required for calibration.

Chemical identity

Chemical name
Dichloroacetonitrile
CAS number
3018-12-0
Molecular formula
C2HCl2N
Molecular weight
109.94 g/mol

Application context

Water-analysis projects use dichloroacetonitrile as a target when investigating chlorination by-products. EPA Method 551.1 describes liquid–liquid extraction followed by gas chromatography with electron-capture detection for this analytical context. A buyer preparing calibration materials should specify neat substance or solution, solvent, concentration units, traceability and validity requirements. Related haloacetonitriles can affect a multi-analyte separation, so review the impurity profile against the actual method. For research stock solutions, storage and use periods should follow the selected material documentation.

Chemistry and synthetic role

Two chlorines occupy the carbon adjacent to the nitrile in CHCl2–CN.

Quality review

Define neat material or solution

Specify concentration, solvent and units for any prepared solution.

Review haloacetonitrile separation

Assess related chlorinated or brominated nitriles against the method.

Establish the assigned value

For calibration, agree purity or concentration assignment and traceability.

Preparing a specification

Specify neat or solution form, analytical purpose, assigned purity or concentration, solvent where applicable and relevant haloacetonitrile impurities.

Packaging and storage

Packaging and net weight are agreed for the selected grade, order quantity and destination. Check the actual supplier SDS and label for storage and transport requirements.

Documentation

Request a batch COA, SDS and the analytical methods for the acceptance criteria below. Confirm which supporting chromatograms and identity data are available from the selected manufacturer.

Procurement questions

Does this CAS define a solution concentration?

No. It identifies the chemical component.

Which impurities matter for water analysis?

Those co-eluting with target analytes or affecting the required quantitation.

Can a reagent COA replace reference certification?

Only if its data satisfy the method’s calibration requirements.

Technical sources
  1. PubChem CID 18177NCBI / PubChem
  2. Dichloroacetonitrile 125954Merck / Sigma-Aldrich
  3. EPA Method 551.1US EPA