| Record Information |
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| Version | 2.0 |
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| Creation Date | 2009-06-17 23:53:06 UTC |
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| Update Date | 2014-12-24 20:23:03 UTC |
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| Accession Number | T3D1018 |
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| Identification |
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| Common Name | Trimethacarb |
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| Class | Small Molecule |
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| Description | Trimethacarb is a carbamate pesticide. Carbamate pesticides are derived from carbamic acid and kill insects in a similar fashion as organophosphate insecticides. They are widely used in homes, gardens and agriculture. The first carbamate, carbaryl, was introduced in 1956 and more of it has been used throughout the world than all other carbamates combined. Because of carbaryl's relatively low mammalian oral and dermal toxicity and broad control spectrum, it has had wide use in lawn and garden settings. Most of the carbamates are extremely toxic to Hymenoptera, and precautions must be taken to avoid exposure to foraging bees or parasitic wasps. Some of the carbamates are translocated within plants, making them an effective systemic treatment. (3) |
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| Compound Type | - Amine
- Carbamate
- Ester
- Ether
- Organic Compound
- Pesticide
- Synthetic Compound
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| Chemical Structure | |
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| Synonyms | | Synonym | | 3,4,5-Landrin | | 3,4,5-Trimethacarb | | 3,4,5-Trimethylphenol methylcarbamate | | 3,4,5-Trimethylphenyl methylcarbamate | | 3,4,5-Trimethylphenyl N-methylcarbamate | | Broot | | Carbamic acid, methyl-, 3,4,5-trimethylphenyl ester | | Carbamic acid, methyl-, 3,4,5-trimethylphenyl ester (7ci) | | Caswell No. 893A | | Landrin 1 | | Landrin a | | Landrin-3,4,5 | | Methylcarbamic acid 3,4,5-trimethylphenyl ester | | Phenol, 3,4,5-trimethyl-, methylcarbamate (9CI) | | Shell SD-8530 |
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| Chemical Formula | C11H15NO2 |
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| Average Molecular Mass | 193.242 g/mol |
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| Monoisotopic Mass | 193.110 g/mol |
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| CAS Registry Number | 2686-99-9 |
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| IUPAC Name | 3,4,5-trimethylphenyl N-methylcarbamate |
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| Traditional Name | landrin |
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| SMILES | CNC(=O)OC1=CC(C)=C(C)C(C)=C1 |
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| InChI Identifier | InChI=1S/C11H15NO2/c1-7-5-10(14-11(13)12-4)6-8(2)9(7)3/h5-6H,1-4H3,(H,12,13) |
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| InChI Key | InChIKey=AUQAUAIUNJIIEP-UHFFFAOYSA-N |
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| Chemical Taxonomy |
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| Description | belongs to the class of organic compounds known as phenoxy compounds. These are aromatic compounds contaning a phenoxy group. |
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| Kingdom | Organic compounds |
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| Super Class | Benzenoids |
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| Class | Benzene and substituted derivatives |
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| Sub Class | Phenoxy compounds |
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| Direct Parent | Phenoxy compounds |
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| Alternative Parents | |
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| Substituents | - Phenoxy compound
- Organic 1,3-dipolar compound
- Propargyl-type 1,3-dipolar organic compound
- Carboximidic acid derivative
- Organic nitrogen compound
- Organic oxygen compound
- Organopnictogen compound
- Hydrocarbon derivative
- Organooxygen compound
- Organonitrogen compound
- Imine
- Aromatic homomonocyclic compound
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| Molecular Framework | Aromatic homomonocyclic compounds |
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| External Descriptors | |
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| Biological Properties |
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| Status | Detected and Not Quantified |
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| Origin | Exogenous |
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| Cellular Locations | |
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| Biofluid Locations | Not Available |
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| Tissue Locations | Not Available |
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| Pathways | Not Available |
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| Applications | |
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| Biological Roles | Not Available |
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| Chemical Roles | Not Available |
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| Physical Properties |
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| State | Solid |
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| Appearance | White powder. |
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| Experimental Properties | | Property | Value |
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| Melting Point | 109°C | | Boiling Point | Not Available | | Solubility | Not Available | | LogP | Not Available |
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| Predicted Properties | |
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| Spectra |
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| Spectra | | Spectrum Type | Description | Splash Key | Deposition Date | View |
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| Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - 10V, Positive | splash10-000l-3900000000-b78040a8dfd1fd778ab1 | 2016-08-03 | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - 20V, Positive | splash10-000i-3900000000-435cf8178497a5309262 | 2016-08-03 | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - 40V, Positive | splash10-0690-9600000000-2c81d2ba6727f460bff9 | 2016-08-03 | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - 10V, Negative | splash10-0a4l-7900000000-d949c088a8c3f29ffcea | 2016-08-03 | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - 20V, Negative | splash10-0a4r-6900000000-1648a49a0168d65a5cd3 | 2016-08-03 | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - 40V, Negative | splash10-0a4r-9700000000-e11a540608d910f749ee | 2016-08-03 | View Spectrum |
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| Toxicity Profile |
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| Route of Exposure | Inhalation (2) ; oral (2); dermal (2) |
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| Mechanism of Toxicity | Trimethacarb is a cholinesterase or acetylcholinesterase (AChE) inhibitor. Carbamates form unstable complexes with chlolinesterases by carbamoylation of the active sites of the enzymes. This inhibition is reversible. A cholinesterase inhibitor suppresses the action of acetylcholine esterase. Because of its essential function, chemicals that interfere with the action of acetylcholine esterase are potent neurotoxins, causing excessive salivation and eye-watering in low doses. Headache, salivation, nausea, vomiting, abdominal pain and diarrhea are often prominent at higher levels of exposure. Acetylcholine esterase breaks down the neurotransmitter acetylcholine, which is released at nerve and muscle junctions, in order to allow the muscle or organ to relax. The result of acetylcholine esterase inhibition is that acetylcholine builds up and continues to act so that any nerve impulses are continually transmitted and muscle contractions do not stop. |
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| Metabolism | The carbamates are hydrolyzed enzymatically by the liver; degradation products are excreted by the kidneys and the liver. (2) |
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| Toxicity Values | Not Available |
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| Lethal Dose | Not Available |
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| Carcinogenicity (IARC Classification) | No indication of carcinogenicity to humans (not listed by IARC). |
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| Uses/Sources | Trimethacarb is widely used as an insecticide or pesticide in homes, gardens and agricultural applications. It is a synthetic compound. |
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| Minimum Risk Level | Not Available |
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| Health Effects | Acute exposure to cholinesterase inhibitors can cause a cholinergic crisis characterized by severe nausea/vomiting, salivation, sweating, bradycardia, hypotension, collapse, and convulsions. Increasing muscle weakness is a possibility and may result in death if respiratory muscles are involved. Accumulation of ACh at motor nerves causes overstimulation of nicotinic expression at the neuromuscular junction. When this occurs symptoms such as muscle weakness, fatigue, muscle cramps, fasciculation, and paralysis can be seen. When there is an accumulation of ACh at autonomic ganglia this causes overstimulation of nicotinic expression in the sympathetic system. Symptoms associated with this are hypertension, and hypoglycemia. Overstimulation of nicotinic acetylcholine receptors in the central nervous system, due to accumulation of ACh, results in anxiety, headache, convulsions, ataxia, depression of respiration and circulation, tremor, general weakness, and potentially coma. When there is expression of muscarinic overstimulation due to excess acetylcholine at muscarinic acetylcholine receptors symptoms of visual disturbances, tightness in chest, wheezing due to bronchoconstriction, increased bronchial secretions, increased salivation, lacrimation, sweating, peristalsis, and urination can occur. Chronically high (>10 years) exposure leads to neuropsychological consequences including disturbances in perception and visuo-motor processing (1). |
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| Symptoms | As with organophosphates, the signs and symptoms are based on excessive cholinergic stimulation. Unlike organophosphate poisoning, carbamate poisonings tend to be of shorter duration because the inhibition of nervous tissue acetylcholinesterase is reversible, and carbamates are more rapidly metabolized. Muscle weakness, dizziness, sweating and slight body discomfort are commonly reported early symptoms. Headache, salivation, nausea, vomiting, abdominal pain and diarrhea are often prominent at higher levels of exposure. Contraction of the pupils with blurred vision, incoordination, muscle twitching and slurred speech have been reported. (3) |
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| Treatment | If the compound has been ingested, rapid gastric lavage should be performed using 5% sodium bicarbonate. For skin contact, the skin should be washed with soap and water. If the compound has entered the eyes, they should be washed with large quantities of isotonic saline or water. In serious cases, atropine and/or pralidoxime should be administered. Anti-cholinergic drugs work to counteract the effects of excess acetylcholine and reactivate AChE. Atropine can be used as an antidote in conjunction with pralidoxime or other pyridinium oximes (such as trimedoxime or obidoxime), though the use of '-oximes' has been found to be of no benefit, or possibly harmful, in at least two meta-analyses. Atropine is a muscarinic antagonist, and thus blocks the action of acetylcholine peripherally. |
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| Normal Concentrations |
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| Not Available |
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| Abnormal Concentrations |
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| Not Available |
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| External Links |
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| DrugBank ID | Not Available |
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| HMDB ID | Not Available |
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| PubChem Compound ID | 17592 |
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| ChEMBL ID | Not Available |
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| ChemSpider ID | 16632 |
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| KEGG ID | Not Available |
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| UniProt ID | Not Available |
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| OMIM ID | |
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| ChEBI ID | 38894 |
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| BioCyc ID | CPD-10489 |
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| CTD ID | Not Available |
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| Stitch ID | Trimethacarb |
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| PDB ID | Not Available |
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| ACToR ID | Not Available |
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| Wikipedia Link | Not Available |
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| References |
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| Synthesis Reference | Not Available |
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| MSDS | T3D1018.pdf |
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| General References | - Roldan-Tapia L, Nieto-Escamez FA, del Aguila EM, Laynez F, Parron T, Sanchez-Santed F: Neuropsychological sequelae from acute poisoning and long-term exposure to carbamate and organophosphate pesticides. Neurotoxicol Teratol. 2006 Nov-Dec;28(6):694-703. Epub 2006 Aug 30. [17029710 ]
- IPCS Intox Database (1987). Antimony pentoxide. [Link]
- Fishel F (2009). Pesticide Toxicity Profile: Carbamate Pesticides. University of Florida, IFAS Extension. [Link]
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| Gene Regulation |
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| Up-Regulated Genes | Not Available |
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| Down-Regulated Genes | Not Available |
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