Chloroethanoic acid . Chloroacetic acid Names Preferred IUPAC name. … Dissociation constant; Viscosity; Additional physico-chemical information; Additional physico-chemical properties of nanomaterials . Identifiers CAS Number. EC number: 201-178-4 | CAS number: 79-11-8 . Display Name: Chloroacetic acid EC Number: 201-178-4 EC Name: Chloroacetic acid CAS Number: 79-11-8 Molecular formula: C2H3ClO2 IUPAC Name: 2-chloroacetic acid Nanomaterial agglomeration / aggregation; Nanomaterial crystalline phase; Nanomaterial crystallite and grain size; Nanomaterial aspect ratio / shape; Nanomaterial specific surface area; Nanomaterial Zeta potential Table 1. Chloroacetic acid EC Inventory, C&L Inventory, REACH pre-registration, Other, CAD - Chemical Agents Directive, Art. Name Formula K a1 pK a1 K a2 pK a2 K a3 pK a3 K a4 pK a4; Acetic acid: CH 3 CO 2 H: 1.75 × 10 −5: 4.756-----Arsenic acid: H 3 AsO 4: 5.5 × 10 −3: 2.26: 1.7 × 10 −7: 6.76: 5.1 × 10 −12: 11.29--Benzoic acid: C 6 H 5 CO 2 H: 6.25 × 10 −5: 4.204-----Boric acid As a result, chloro-acetic acid is a common synthetic organic intermediate, either as the acid itself or as an acid derivative (e.g., salt,ester,anhydride,acyl chloride, amide, hydrazide, etc.). Comparing the two, in the first one the negative charge is taken up mostly by the two oxygen atoms. General information; Classification & Labelling & PBT assessment; Manufacture, use & exposure Other names 2-Chloroacetic acid 2-Chloroethanoic acid. Chloroacetic acid. Chloroacetic acid, industrially known as monochloroacetic acid (MCA), is the organochlorine compound with the formula ClCH 2 CO 2 H. This carboxylic acid is a useful building-block in organic synthesis. In acetic acid, the anion produced by dissociation is CH3-COO-; in chloroacetic acid it is CH2Cl-COO-. Systematic IUPAC name. Some impor- tant reactions that are used for industrial applications are as follows. The dissociation equilibrium reaction for chloroacetic acid is: ClCH2COOH <-----> ClCH2COO(− ) + H(+), The acid-dissociation equilibrium constant is: In the second there is also an electronegative chlorine atom nearby to draw more charge towards itself.