2-(4-chloro-2-methylphenoxy)acetic acid
C9H9ClO3
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Identification
- CAS Number
- 94-74-6
- EC Number
- 202-360-6
- UN Number
- 3077
- Index Number
- 607-051-00-3
- PubChem CID
- 7204
Physical-chemical properties
- Molecular Formula
- C9H9ClO3
- Molar Mass
- 200.62 g/mol
- IUPAC Name
- 2-(4-chloro-2-methylphenoxy)acetic acid
Chemical Identifiers
- InChI
- InChI=1S/C9H9ClO3/c1-6-4-7(10)2-3-8(6)13-5-9(11)12/h2-4H,5H2,1H3,(H,11,12)
- InChI Key
- WHKUVVPPKQRRBV-UHFFFAOYSA-N
Overview
2-(4-chloro-2-methylphenoxy)acetic acid (CAS 94-74-6) is a chlorinated phenoxyacetic acid derivative with herbicidal properties and regulatory applications in plant growth control. This organochlorine compound, with the molecular formula C9H9ClO3 and a molecular weight of 200.62 g/mol, belongs to the phenoxyacetic acid family of chemicals widely recognized for their biological activity. Also known by its EC number 202-360-6, this substance features a characteristic aromatic ring structure substituted with chlorine and methyl groups, connected to an acetic acid moiety through an ether linkage. The compound's structural similarity to 2-(4-chloro-2-methylphenoxy)propanoic acid, another member of this chemical family, reflects the systematic variations possible within phenoxyacetic acid derivatives. The substance presents significant safety considerations, classified under multiple hazard categories including acute toxicity (Category 4), skin irritation (Category 2), and serious eye damage (Category 1). Its environmental profile shows both acute and chronic aquatic toxicity, requiring careful handling protocols. The GHS pictograms GHS07, GHS05, and GHS09 emphasize the health, corrosive, and environmental hazards respectively, while the "Danger" signal word indicates the severity of potential risks. Transportation falls under ADR Class 9 for miscellaneous dangerous substances. Industrial applications primarily focus on agricultural formulations and research applications where controlled plant growth regulation is required. The compound also finds use in specialized chemical synthesis processes and as an intermediate in the production of related phenoxyacetic acid derivatives. Research institutions frequently utilize this substance for botanical studies and herbicide development programs. OYSI maintains availability of 2-(4-chloro-2-methylphenoxy)acetic acid for qualified industrial and research customers throughout Europe, ensuring compliance with all relevant chemical regulations.
Safety & Classification
Acute Tox. 4 *; Skin Irrit. 2; Eye Dam. 1; Aquatic Acute 1; Aquatic Chronic 1
GHS Pictograms
HHazard Statements (H-Statements)
Describe the nature and severity of the hazard
Classification according to CLP Regulation (EC) No 1272/2008. The complete list of hazard and precautionary statements can be found in the Safety Data Sheet (SDS).
First Aid Measures
Skin Contact
Measures if substance contacts the skin
First Aid Actions
- +P302IF ON SKIN:
- +P352Wash with plenty of water.
- +P361Take off immediately all contaminated clothing.
- +P313Get medical advice/attention.
Related hazard statements:
Eye Contact
Measures if substance gets into the eyes
First Aid Actions
- +P305IF IN EYES:
- +P351Rinse cautiously with water for several minutes.
- +P338Remove contact lenses, if present and easy to do. Continue rinsing.
- +P313Get medical advice/attention.
Related hazard statements:
Ingestion
Measures if substance is accidentally swallowed
First Aid Actions
- +P301IF SWALLOWED:
- +P330Rinse mouth.
- +P331Do NOT induce vomiting.
- +P310Immediately call a POISON CENTER/doctor.
Related hazard statements:
General Measures
Emergency 112 | Poison Control: +49 30 19240 (DE), +33 1 45 42 59 59 (FR), +31 30 274 88 88 (NL)
First aid measures are based on CLP classification and associated P-statements. They do not replace the Safety Data Sheet (SDS). In case of emergency, always consult the full SDS and a physician.
Transport (ADR)
| UN Number | 3077 |
| ADR Class | 9 |
| Packing Group | III |
| Tunnel Code | - |
| Proper Shipping Name | MCPA (ISO) |
| Marine Pollutant | No |
Frequently Asked Questions
What is 2-(4-chloro-2-methylphenoxy)acetic acid?
2-(4-chloro-2-methylphenoxy)acetic acid is a synthetic organic compound with the molecular formula C9H9ClO3 and CAS number 94-74-6. This chlorinated phenoxyacetic acid derivative has a molecular weight of 200.62 g/mol and belongs to the family of substituted acetic acids. It features a phenoxy group with both chlorine and methyl substituents attached to an acetic acid moiety, making it a versatile chemical intermediate with specific biological and industrial applications.
What are the physicochemical properties of 2-(4-chloro-2-methylphenoxy)acetic acid?
2-(4-chloro-2-methylphenoxy)acetic acid typically appears as a white to off-white crystalline solid at room temperature. The compound has a molecular weight of 200.62 g/mol and contains both polar (carboxylic acid) and nonpolar (chlorinated aromatic) regions. It shows moderate solubility in polar solvents like water and alcohols, while being more soluble in organic solvents. The presence of the chlorine atom and methyl group influences its melting point and stability characteristics.
What is 2-(4-chloro-2-methylphenoxy)acetic acid used for?
2-(4-chloro-2-methylphenoxy)acetic acid serves primarily as a chemical intermediate in the synthesis of herbicides and plant growth regulators. It is commonly used in the agricultural industry for the production of selective herbicides that target broadleaf weeds. The compound also finds applications in pharmaceutical research and development as a building block for various bioactive molecules. Additionally, it may be utilized in specialty chemical manufacturing for producing derivatives with specific biological activities.
How to handle 2-(4-chloro-2-methylphenoxy)acetic acid safely?
2-(4-chloro-2-methylphenoxy)acetic acid requires careful handling due to its classification as Acute Tox. 4, Skin Irrit. 2, and Eye Dam. 1. Essential personal protective equipment includes chemical-resistant gloves, safety goggles or face shield, and protective clothing. Work in well-ventilated areas or under fume hoods to prevent inhalation. Avoid direct skin and eye contact, and ensure proper hygiene practices. Emergency eyewash stations and safety showers should be readily accessible when working with this substance.
How to store 2-(4-chloro-2-methylphenoxy)acetic acid correctly?
2-(4-chloro-2-methylphenoxy)acetic acid should be stored in a cool, dry, well-ventilated area away from direct sunlight and heat sources. Keep containers tightly sealed to prevent moisture absorption and contamination. Store separately from incompatible materials such as strong bases, oxidizing agents, and reactive metals. Use appropriate secondary containment and ensure storage areas are equipped with spill control measures. Regular inspection of container integrity is recommended to prevent leakage and environmental release.
What to do in case of contact with 2-(4-chloro-2-methylphenoxy)acetic acid?
Immediate action is required due to the substance's eye damage and skin irritation potential. For eye contact, flush immediately with plenty of clean water for at least 15 minutes and seek medical attention urgently. In case of skin contact, remove contaminated clothing and wash affected area thoroughly with soap and water. If inhaled, move to fresh air immediately. For ingestion, do not induce vomiting and seek medical advice. Always consult the safety data sheet and contact emergency services when necessary.
How to dispose of 2-(4-chloro-2-methylphenoxy)acetic acid properly?
2-(4-chloro-2-methylphenoxy)acetic acid disposal must comply with local and international hazardous waste regulations due to its environmental hazard classification (Aquatic Acute 1; Aquatic Chronic 1). Contact licensed hazardous waste disposal companies for proper treatment and disposal. Never discharge into sewers, waterways, or soil. Small quantities may require neutralization before disposal, but this should only be performed by trained professionals. Maintain detailed disposal records and obtain proper waste disposal certificates as required by regulations.
How to transport 2-(4-chloro-2-methylphenoxy)acetic acid?
2-(4-chloro-2-methylphenoxy)acetic acid is classified as ADR Class 9 (Miscellaneous dangerous goods), Packing Group III for transportation purposes. This classification requires specific packaging, labeling, and documentation according to international dangerous goods regulations. Use UN-approved packaging and ensure proper hazard labels and transport documentation are attached. Vehicle placarding may be required depending on quantities transported. Drivers must be trained in dangerous goods handling and carry appropriate emergency response information during transport.
Is 2-(4-chloro-2-methylphenoxy)acetic acid subject to specific regulations?
2-(4-chloro-2-methylphenoxy)acetic acid is regulated under multiple frameworks including REACH registration requirements in Europe and CLP classification regulations. The substance carries specific GHS pictograms (GHS05, GHS07, GHS09) and requires comprehensive safety data sheets. While not currently listed as a SVHC (Substance of Very High Concern), its environmental hazard classification subjects it to strict handling and disposal regulations. Users must comply with occupational exposure limits and environmental protection measures as mandated by local authorities.
Where to buy 2-(4-chloro-2-methylphenoxy)acetic acid in Europe?
2-(4-chloro-2-methylphenoxy)acetic acid is available through OYSI, a specialized European distributor of industrial chemicals and intermediates. OYSI provides this compound with full regulatory compliance including proper classification, labeling, and safety documentation required under European regulations. As a professional chemical distributor, OYSI ensures product quality and regulatory adherence for industrial and research applications. Contact OYSI directly for availability, technical specifications, and delivery options across European markets.
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2-(4-chloro-2-methylphenoxy)acetic acid is a dangerous good. We support you with labeling, packaging, and transport documentation.
Data Sources
Classification per CLP Regulation (EC) No 1272/2008. Data from ECHA and PubChem.