2-Methyl-4-chlorophenoxyacetic acid (CAS 94-74-6) — formula C9H9ClO3, molecular weight 200.62; category organic chemicals.
| CAS Number | 94-74-6 |
|---|---|
| Molecular Formula | C9H9ClO3 |
| Molecular Weight | 200.62 |
| Melting Point | 118-119 °C |
| LogP | log Kow = 3.25 |
| Applications | Uses: Used as a post-emergence herbicide for control of annual and perennial broad leaved weeds in cereals, herbage seed crops, flax, rice, vines, peas, potatoes, asparagus, grassland, turf, orchards, roadsides, forestry, and aquatic areas, [HSDB], Farming (Pesticides) [Category: Industry], For 2-Methyl-4-chlorophenoxyacetic acid (USEPA, OPP Pesticide Code: 030501) ACTIVE products with label matches., SRP: Registered for use in the U.S. but approved pesticide uses may change periodically and so federal, state and local authorities must be consulted for currently approved uses., MCPA is used as a postemergence herbicide for control of broadleaf weeds in agricultural applications., HERBICIDE FOR CONTROL OF ANNUAL & PERENNIAL WEEDS, Post-emergence control of annual and perennial broad leaved weeds (including thistles and docks) in cereals (alone or undersown), under fruit trees, and on roadside verges and embankments. Control of broad-leaved and woody weeds in forestry. Control of aquatic broad leaved weeds., Dioxins occur as by-products from the manufacture of organochlorides, the bleaching of paper, chlorination by waste and drinking water treatment plants, municipal solid waste and industrial incinerators, and natural sources such as volcanoes and forest fires. (L177, L178), Use Classification: Environmental transformation -> Pesticides (parent, predecessor), Environmental transformation -> Pesticide transformation products (metabolite, successor), Herbicides, Transformation products, Methods of Manufacturing: CHLORINATION OF O-CRESOL FOLLOWED BY REACTION WITH THE SODIUM SALT OF MONOCHLOROACETIC ACID, Ethylmercaptan + 2-methyl-4-chlorophenoxyacetic acid (thioesterification), Impurities: The technical grade might contain 3-40% 6-chloro-2-methylphenoxyacetic acid. The hormone-type herbicide, commercial grade contains 4% of 4-chloro-o-cresol., Formulations, Preparations: USEPA, OPP Pesticide Code 030501, Trade Names: Mephanac, Agroxone, Bordermaster, BH MCPA, Cekherbex, chiptox, DED-Weed, empal, Hedonal M, Hormotuho, Kilsem, M 40, Phenoxylene Plus, Rhomene, Rhonox, Shamrox, Vacate, Fluid 4, weedar, Weedone, Zelan, Dikotex, Hedonal., TECHNICAL MCPA HAS TYPICAL COMPOSITION OF: MCPA, 94-96%, 2-METHYL-6-CHLOROPHENOXYACETIC ACID, 1.5-3.0%, MIXTURE OF 2-METHYL-4, 6-DICHLOROPHENOXYACETIC ACID, 2-METHYLPHENOXYACETIC ACID, 2-CHLOROPHENOXYACETIC ACID, 4-CHLOROPHENOXYACETIC ACID, & 2, 6-DIMETHYL-4-CHLOROPHENOXYACETIC 0.5-1.5%, CHLORO-O-CRESOL, 0.5% & WATER, 1.0%., MCPA IS AVAILABLE AS AMINES, ESTERS, & SODIUM OR POTASSIUM SALTS., BANVEL M IS MIXTURE OF MCPA & BANVEL. BROMINAL PLUS & BRONATE...ARE MIXTURE OF MCPA & BROMOXYNIL. PHENOXYLENE SUPER IS MIXTURE OF MCPA WITH DICAMBA. BANLENE PLUS, RAZOL DOCK PROPORTIONS., For more Formulations, Preparations (Complete) data for 2-METHYL-4-CHLOROPHENOXYACETIC ACID (10 total), please visit the HSDB record page., Consumption Patterns: HERBICIDE, OF WHICH APPROXIMATELY 69% IS USED ON WHEAT, 18% ON OTHER GRAINS, & 13% ON RICE (1975), (1992) Total pounds applied to: wheat and grains (3, 445, 394), barley (633, 976), pasture (225, 232), oats (207, 439), rice (60, 022), field and grass seed (51, 260, flax (13, 334), dry peas (7, 103), rye (6, 942), green peas (6, 636)., U.S. Production: (1975) 1.77X10+9 GRAMS (CONSUMPTION), General Manufacturing Information: Acetic acid, 2-(4-chloro-2-methylphenoxy)-: ACTIVE, Avoid spray drifts onto susceptible plants such as grapes, tomatoes, & cotton., SELECTIVE FOLIAGE BROADLEAF KILLER, SIMILAR TO 2, 4-D. MORE SELECTIVE THAN 2, 4-D @ EQUAL RATES ON CEREALS, LEGUMES & FLAX. APPLICATION METHODS: AERIAL & GROUND APPLICATION, LOW-VOLUME SPRAY. RATES: USED @ RATES FROM 0.12 TO 1 LB AI, ACRE. USUAL CARRIER: WATER 2 TO 30 GAL, ACRE., ... Herbicide absorbed by the leaves and roots, with translocation. Concentrates in the meristematic regions, where it inhibits growth., MCPA, is a systemic hormone-type selective herbicide., For more General Manufacturing Information (Complete) data for 2-METHYL-4-CHLOROPHENOXYACETIC ACID (6 total) |
| Category | Organic Chemicals |
Documented applications: Uses: Used as a post-emergence herbicide for control of annual and perennial broad leaved weeds in cereals, herbage seed crops, flax, rice, vines, peas, potatoes, asparagus, grassland, turf, orchards, roadsides, forestry, and aquatic areas, [HSDB], Farming (Pesticides) [Category: Industry], For 2-Methyl-4-chlorophenoxyacetic acid (USEPA, OPP Pesticide Code: 030501) ACTIVE products with label matches., SRP: Registered for use in the U.S. but approved pesticide uses may change periodically and so federal, state and local authorities must be consulted for currently approved uses., MCPA is used as a postemergence herbicide for control of broadleaf weeds in agricultural applications., HERBICIDE FOR CONTROL OF ANNUAL & PERENNIAL WEEDS, Post-emergence control of annual and perennial broad leaved weeds (including thistles and docks) in cereals (alone or undersown), under fruit trees, and on roadside verges and embankments. Control of broad-leaved and woody weeds in forestry. Control of aquatic broad leaved weeds., Dioxins occur as by-products from the manufacture of organochlorides, the bleaching of paper, chlorination by waste and drinking water treatment plants, municipal solid waste and industrial incinerators, and natural sources such as volcanoes and forest fires. (L177, L178), Use Classification: Environmental transformation -> Pesticides (parent, predecessor), Environmental transformation -> Pesticide transformation products (metabolite, successor), Herbicides, Transformation products, Methods of Manufacturing: CHLORINATION OF O-CRESOL FOLLOWED BY REACTION WITH THE SODIUM SALT OF MONOCHLOROACETIC ACID, Ethylmercaptan + 2-methyl-4-chlorophenoxyacetic acid (thioesterification), Impurities: The technical grade might contain 3-40% 6-chloro-2-methylphenoxyacetic acid. The hormone-type herbicide, commercial grade contains 4% of 4-chloro-o-cresol., Formulations, Preparations: USEPA, OPP Pesticide Code 030501, Trade Names: Mephanac, Agroxone, Bordermaster, BH MCPA, Cekherbex, chiptox, DED-Weed, empal, Hedonal M, Hormotuho, Kilsem, M 40, Phenoxylene Plus, Rhomene, Rhonox, Shamrox, Vacate, Fluid 4, weedar, Weedone, Zelan, Dikotex, Hedonal., TECHNICAL MCPA HAS TYPICAL COMPOSITION OF: MCPA, 94-96%, 2-METHYL-6-CHLOROPHENOXYACETIC ACID, 1.5-3.0%, MIXTURE OF 2-METHYL-4, 6-DICHLOROPHENOXYACETIC ACID, 2-METHYLPHENOXYACETIC ACID, 2-CHLOROPHENOXYACETIC ACID, 4-CHLOROPHENOXYACETIC ACID, & 2, 6-DIMETHYL-4-CHLOROPHENOXYACETIC 0.5-1.5%, CHLORO-O-CRESOL, 0.5% & WATER, 1.0%., MCPA IS AVAILABLE AS AMINES, ESTERS, & SODIUM OR POTASSIUM SALTS., BANVEL M IS MIXTURE OF MCPA & BANVEL. BROMINAL PLUS & BRONATE...ARE MIXTURE OF MCPA & BROMOXYNIL. PHENOXYLENE SUPER IS MIXTURE OF MCPA WITH DICAMBA. BANLENE PLUS, RAZOL DOCK PROPORTIONS., For more Formulations, Preparations (Complete) data for 2-METHYL-4-CHLOROPHENOXYACETIC ACID (10 total), please visit the HSDB record page., Consumption Patterns: HERBICIDE, OF WHICH APPROXIMATELY 69% IS USED ON WHEAT, 18% ON OTHER GRAINS, & 13% ON RICE (1975), (1992) Total pounds applied to: wheat and grains (3, 445, 394), barley (633, 976), pasture (225, 232), oats (207, 439), rice (60, 022), field and grass seed (51, 260, flax (13, 334), dry peas (7, 103), rye (6, 942), green peas (6, 636)., U.S. Production: (1975) 1.77X10+9 GRAMS (CONSUMPTION), General Manufacturing Information: Acetic acid, 2-(4-chloro-2-methylphenoxy)-: ACTIVE, Avoid spray drifts onto susceptible plants such as grapes, tomatoes, & cotton., SELECTIVE FOLIAGE BROADLEAF KILLER, SIMILAR TO 2, 4-D. MORE SELECTIVE THAN 2, 4-D @ EQUAL RATES ON CEREALS, LEGUMES & FLAX. APPLICATION METHODS: AERIAL & GROUND APPLICATION, LOW-VOLUME SPRAY. RATES: USED @ RATES FROM 0.12 TO 1 LB AI, ACRE. USUAL CARRIER: WATER 2 TO 30 GAL, ACRE., ... Herbicide absorbed by the leaves and roots, with translocation. Concentrates in the meristematic regions, where it inhibits growth., MCPA, is a systemic hormone-type selective herbicide., For more General Manufacturing Information (Complete) data for 2-METHYL-4-CHLOROPHENOXYACETIC ACID (6 total).
2-Methyl-4-chlorophenoxyacetic acid is a carbon-based organic compound with CAS registry number 94-74-6 and molecular formula C9H9ClO3 (molecular weight 200.62), belonging to the organic chemicals segment of chemical raw materials.
CAS number: 94-74-6
Its molecular formula C9H9ClO3 comprises 9 C, 9 H, 1 Cl, 3 O atoms.
Also known as: 2-Methyl-4-chlorophenoxyacetic acid · MCPA
Category: organic chemicals
The CAS registry number of 2-Methyl-4-chlorophenoxyacetic acid is 94-74-6.
Molecular formula C9H9ClO3, molecular weight 200.62.
It is also registered under: 2-Methyl-4-chlorophenoxyacetic acid, MCPA.
Recorded applications: Uses: Used as a post-emergence herbicide for control of annual and perennial broad leaved weeds in cereals, herbage seed crops, flax, rice, vines, peas, potatoes, asparagus, grassland, turf, orchards, roadsides, forestry, and aquatic areas, [HSDB], Farming (Pesticides) [Category: Industry], For 2-Methyl-4-chlorophenoxyacetic acid (USEPA, OPP Pesticide Code: 030501) ACTIVE products with label matches., SRP: Registered for use in the U.S. but approved pesticide uses may change periodically and so federal, state and local authorities must be consulted for currently approved uses., MCPA is used as a postemergence herbicide for control of broadleaf weeds in agricultural applications., HERBICIDE FOR CONTROL OF ANNUAL & PERENNIAL WEEDS, Post-emergence control of annual and perennial broad leaved weeds (including thistles and docks) in cereals (alone or undersown), under fruit trees, and on roadside verges and embankments. Control of broad-leaved and woody weeds in forestry. Control of aquatic broad leaved weeds., Dioxins occur as by-products from the manufacture of organochlorides, the bleaching of paper, chlorination by waste and drinking water treatment plants, municipal solid waste and industrial incinerators, and natural sources such as volcanoes and forest fires. (L177, L178), Use Classification: Environmental transformation -> Pesticides (parent, predecessor), Environmental transformation -> Pesticide transformation products (metabolite, successor), Herbicides, Transformation products, Methods of Manufacturing: CHLORINATION OF O-CRESOL FOLLOWED BY REACTION WITH THE SODIUM SALT OF MONOCHLOROACETIC ACID, Ethylmercaptan + 2-methyl-4-chlorophenoxyacetic acid (thioesterification), Impurities: The technical grade might contain 3-40% 6-chloro-2-methylphenoxyacetic acid. The hormone-type herbicide, commercial grade contains 4% of 4-chloro-o-cresol., Formulations, Preparations: USEPA, OPP Pesticide Code 030501, Trade Names: Mephanac, Agroxone, Bordermaster, BH MCPA, Cekherbex, chiptox, DED-Weed, empal, Hedonal M, Hormotuho, Kilsem, M 40, Phenoxylene Plus, Rhomene, Rhonox, Shamrox, Vacate, Fluid 4, weedar, Weedone, Zelan, Dikotex, Hedonal., TECHNICAL MCPA HAS TYPICAL COMPOSITION OF: MCPA, 94-96%, 2-METHYL-6-CHLOROPHENOXYACETIC ACID, 1.5-3.0%, MIXTURE OF 2-METHYL-4, 6-DICHLOROPHENOXYACETIC ACID, 2-METHYLPHENOXYACETIC ACID, 2-CHLOROPHENOXYACETIC ACID, 4-CHLOROPHENOXYACETIC ACID, & 2, 6-DIMETHYL-4-CHLOROPHENOXYACETIC 0.5-1.5%, CHLORO-O-CRESOL, 0.5% & WATER, 1.0%., MCPA IS AVAILABLE AS AMINES, ESTERS, & SODIUM OR POTASSIUM SALTS., BANVEL M IS MIXTURE OF MCPA & BANVEL. BROMINAL PLUS & BRONATE...ARE MIXTURE OF MCPA & BROMOXYNIL. PHENOXYLENE SUPER IS MIXTURE OF MCPA WITH DICAMBA. BANLENE PLUS, RAZOL DOCK PROPORTIONS., For more Formulations, Preparations (Complete) data for 2-METHYL-4-CHLOROPHENOXYACETIC ACID (10 total), please visit the HSDB record page., Consumption Patterns: HERBICIDE, OF WHICH APPROXIMATELY 69% IS USED ON WHEAT, 18% ON OTHER GRAINS, & 13% ON RICE (1975), (1992) Total pounds applied to: wheat and grains (3, 445, 394), barley (633, 976), pasture (225, 232), oats (207, 439), rice (60, 022), field and grass seed (51, 260, flax (13, 334), dry peas (7, 103), rye (6, 942), green peas (6, 636)., U.S. Production: (1975) 1.77X10+9 GRAMS (CONSUMPTION), General Manufacturing Information: Acetic acid, 2-(4-chloro-2-methylphenoxy)-: ACTIVE, Avoid spray drifts onto susceptible plants such as grapes, tomatoes, & cotton., SELECTIVE FOLIAGE BROADLEAF KILLER, SIMILAR TO 2, 4-D. MORE SELECTIVE THAN 2, 4-D @ EQUAL RATES ON CEREALS, LEGUMES & FLAX. APPLICATION METHODS: AERIAL & GROUND APPLICATION, LOW-VOLUME SPRAY. RATES: USED @ RATES FROM 0.12 TO 1 LB AI, ACRE. USUAL CARRIER: WATER 2 TO 30 GAL, ACRE., ... Herbicide absorbed by the leaves and roots, with translocation. Concentrates in the meristematic regions, where it inhibits growth., MCPA, is a systemic hormone-type selective herbicide., For more General Manufacturing Information (Complete) data for 2-METHYL-4-CHLOROPHENOXYACETIC ACID (6 total).
Category: Organic Chemicals.
Independent reference data for 2-Methyl-4-chlorophenoxyacetic acid (CAS 94-74-6), compiled from public chemistry databases.
| CAS Registry Number | 94-74-6 |
|---|---|
| PubChem CID | 7204 |
| Molecular formula | C9H9ClO3 |
| IUPAC name | 2-(4-chloro-2-methylphenoxy)acetic acid |
| UNII (FDA) | D888C394VO |
| Molecular Weight | 200.62 |
|---|---|
| XLogP3 | 2.6 |
| Hydrogen Bond Donor Count | 1 |
| Hydrogen Bond Acceptor Count | 3 |
| Rotatable Bond Count | 3 |
| Exact Mass | 200.0240218 |
| Monoisotopic Mass | 200.0240218 |
| Topological Polar Surface Area | 46.5 |
| Heavy Atom Count | 13 |
| Melting Point | 118-119 °C |
|---|---|
| Melting Point | 113-119 °C |
| Density | 1.56 @ 25 °C/15.5 °C |
| Vapor Pressure | 0.0000059 [mmHg] |
| Vapor Pressure | 5.90X10-6 mm Hg |
| LogP | log Kow = 3.25 |
| LogP | 2.8 |
| LogP | 2.69 |
| Dissociation Constants | pKa= 3.13 |
| Collision Cross Section | 146.16 Ų [M-H]- |
MCPA; 94-74-6; 2-METHYL-4-CHLOROPHENOXYACETIC ACID; (4-Chloro-2-methylphenoxy)acetic acid; Zelan; Mephanac; Emcepan; Netazol; Rhonox; Herbicide M; Hedarex M; Hedonal M; Okultin M; Leuna M; Bordermaster; Hornotuho
| Reported hazard statements | H302, H315, H318, H400, H410, H312 (16.7%), H332 (16.7%), H411 |
|---|
H302: Harmful if swallowed [Warning Acute toxicity, oral]
H315: Causes skin irritation [Warning Skin corrosion/irritation]
2-Methyl-4-chlorophenoxyacetic acid · CAS 94-74-6 · C9H9ClO3. UNII D888C394VO. Melting Point: 118-119 °C; Melting Point: 113-119 °C; Density: 1.56 @ 25 °C/15.5 °C.
Source: PubChem / Wikidata; the batch COA governs where values differ.
Supplier: Jinan Shenghe Chemical Co., Ltd.