71561-11-0

• 常用中文名：苄草唑
• 常用英文名：pyrazoxyfen
• CAS号：71561-11-0
• 分子式：C₂₀H₁₆Cl₂N₂O₃
• 分子量：403.25900
• 相关类别： 化学农药原药 除草剂 其他除草剂
• 发布时间：2018-08-11 20:37:54
• 更新时间：2024-01-08 11:39:00

• 本品属吡唑类除革剂，是叶绿素合成抑制剂。为广谱稻田除草剂，水稻移栽后1～7d杂草萌芽前或杂草萌芽后施用3kg(a.i.)/ha．可防除一年生和多年生杂草。用于旱田除草效果不好。可用于直播稻田，但是温度高于35℃，会发生暂时性作物药害．不得在稗草长到4～5叶期后施药，而本品的杀草谱随处理时间而异，在灌溉条件下，处理后3～5周，对稗草和慈菇属有着持久的抑制作用，其活性取决千处理时的温度，当低于15℃，活性下降，尤其对萤蔺，低温下防效更差。

名称

• 中文名: 苄草唑
• 英文名: pyrazoxyfen
• 中文别名: 匹唑芬; 2-(4-(2,4-二氯苯甲酰基)-1,3-二甲基吡唑-5-基氧基)苯乙酮; 2-(4-(2,4-二氯苯甲酰基)-1,3-二甲基吡唑-5-基氧)乙酰苯
• 英文别名: 2-[[4-(2,4-dichlorobenzoyl)-1,3-dimethyl-1H-pyrazol-5-yl]oxy]-1-phenylethanone; Pyrazoxyfen [ISO:BSI]; 4-(2,4-dichloro-benzoyl)-1,3-dimethyl-5-(phenyl--carbonylmethoxy)-pyrazole; 2-[4-(2,4-dichlorobenzoyl)-2,5-dimethylpyrazol-3-yl]oxy-1-phenylethanone; 1,3-dimethyl-4-(2,4-dichlorobenzoyl)-5-phenacyloxypyrazole; 2-((4-(2,4-Dichlorobenzoyl)-1,3-dimethyl-1H-pyrazol-5-yl)oxy)-1-phenylethanone; 2-[4-(2,4-dichlorobenzoyl)-1,3-dimethylpyrazol-5-yloxy]acetophenone; Paicer; Ethanone,2-((4-(2,4-dichlorobenzoyl)-1,3-dimethyl-1H-pyrazol-5-yl)oxy)-1-phenyl; 1,3-dimethyl-4-(2,4-dichlorobenzoyl)-5-(benzoylmethoxy)-pyrazole; SL 49; 2-{[4-(2,4-dichlorobenzoyl)-1,3-dimethyl-1H-pyrazol-5-yl]oxy}-1-phenylethan-1-one; 2-(4-(2,4-Dichlorobenzoyl)-1,3-dimethylpyrazol-5-yloxy)acetophenone

物化性质

• 密度: 1.33 g/cm3
• 沸点: 599.9ºC at 760 mmHg
• 分子式: C₂₀H₁₆Cl₂N₂O₃
• 分子量: 403.25900
• 精确质量: 402.05400
• PSA: 61.19000
• LogP: 4.52800
• 折射率: 1.618
• 储存条件:

  存放在密封容器内，并放在阴凉，干燥处。储存的地方必须远离氧化剂，避光2-10ºC保存。

• 稳定性:

  远离氧化物，光，热。

• 分子结构:

  1、 摩尔折射率：106.00

  2、 摩尔体积（m³/mol）：302.3

  3、 等张比容（90.2K）：789.2

  4、 表面张力（dyne/cm）：46.4

  5、 极化率（10^-24cm³）：42.02

• 计算化学:

  1.疏水参数计算参考值（XlogP）:无

  2.氢键供体数量:0

  3.氢键受体数量:4

  4.可旋转化学键数量:6

  5.互变异构体数量:2

  6.拓扑分子极性表面积61.2

  7.重原子数量:27

  8.表面电荷:0

  9.复杂度:541

  10.同位素原子数量:0

  11.确定原子立构中心数量:0

  12.不确定原子立构中心数量:0

  13.确定化学键立构中心数量:0

  14.不确定化学键立构中心数量:0

  15.共价键单元数量:1

• 更多:

  1. 性状：白色结晶性粉末。

  2. 密度（g/mL,25/4℃）：未确定

  3. 相对蒸汽密度（g/mL,空气=1）：未确定

  4. 熔点（ºC）：107-112

  5. 沸点（ºC,常压）：未确定

  6. 沸点（ºC,5.2kPa）：未确定

  7. 折射率：未确定

  8. 闪点（ºC）：未确定

  9. 比旋光度（º）：未确定

  10. 自燃点或引燃温度（ºC）：未确定

  11. 蒸气压（kPa,25ºC）：未确定

  12. 饱和蒸气压（kPa,60ºC）：未确定

  13. 燃烧热（KJ/mol）：未确定

  14. 临界温度（ºC）： 未确定

  15. 临界压力（KPa）： 未确定

  16. 油水（辛醇/水）分配系数的对数值：3.69

  17. 爆炸上限（%,V/V）：未确定

  18. 爆炸下限（%,V/V）：未确定

  19. 溶解性：几乎不溶于水，稍微溶于乙醇，大量溶于丙酮，正己烷。

MSDS

SECTION 1: Identification of the substance/mixture and of the company/undertaking Product identifiers Product name: Pyrazoxyfen REACH No.: A registration number is not available for this substance as the substance or its uses are exempted from registration, the annual tonnage does not require a registration or the registration is envisaged for a later registration deadline. CAS-No.: 71561-11-0 Relevant identified uses of the substance or mixture and uses advised against Identified uses: Laboratory chemicals, Manufacture of substances SECTION 2: Hazards identification Classification of the substance or mixture Classification according to Regulation (EC) No 1272/2008 Acute toxicity, Oral (Category 4), H302 Acute aquatic toxicity (Category 1), H400 For the full text of the H-Statements mentioned in this Section, see Section 16. Classification according to EU Directives 67/548/EEC or 1999/45/EC Xn, N Harmful, Dangerous for the R22, R50 environment For the full text of the R-phrases mentioned in this Section, see Section 16. Label elements Labelling according Regulation (EC) No 1272/2008 Pictogram Signal wordWarning Hazard statement(s) H302Harmful if swallowed. H400Very toxic to aquatic life. Precautionary statement(s) P273Avoid release to the environment. Supplemental Hazardnone Statements Other hazards - none SECTION 3: Composition/information on ingredients Substances Synonyms: 2-[[4-(2,4-Dichlorobenzoyl)-1,3-dimethyl-1H-pyrazol-5-yl]oxy]-1- phenylethanone Formula: C20H16Cl2N2O3 Molecular Weight: 403,26 g/mol CAS-No.: 71561-11-0 Hazardous ingredients according to Regulation (EC) No 1272/2008 ComponentClassificationConcentration 2-[[4-(2,4-Dichlorobenzoyl)-1,3-dimethyl-1H-pyrazol-5-yl]oxy]-1-phenylethanone Acute Tox. 4; Aquatic Acute 1; - H302, H400 For the full text of the H-Statements and R-Phrases mentioned in this Section, see Section 16 SECTION 4: First aid measures Description of first aid measures General advice Consult a physician. Show this safety data sheet to the doctor in attendance. If inhaled If breathed in, move person into fresh air. If not breathing, give artificial respiration. Consult a physician. In case of skin contact Wash off with soap and plenty of water. Consult a physician. In case of eye contact Flush eyes with water as a precaution. If swallowed Never give anything by mouth to an unconscious person. Rinse mouth with water. Consult a physician. Most important symptoms and effects, both acute and delayed The most important known symptoms and effects are described in the labelling (see section 2.2) and/or in section 11 Indication of any immediate medical attention and special treatment needed no data available SECTION 5: Firefighting measures Extinguishing media Suitable extinguishing media Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide. Special hazards arising from the substance or mixture Carbon oxides, nitrogen oxides (NOx), Hydrogen chloride gas Advice for firefighters Wear self contained breathing apparatus for fire fighting if necessary. Further information no data available SECTION 6: Accidental release measures Personal precautions, protective equipment and emergency procedures Use personal protective equipment. Avoid dust formation. Avoid breathing vapours, mist or gas. Ensure adequate ventilation. Evacuate personnel to safe areas. Avoid breathing dust. For personal protection see section 8. Environmental precautions Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Discharge into the environment must be avoided. Methods and materials for containment and cleaning up Pick up and arrange disposal without creating dust. Sweep up and shovel. Keep in suitable, closed containers for disposal. Reference to other sections For disposal see section 13. SECTION 7: Handling and storage Precautions for safe handling Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Provide appropriate exhaust ventilation at places where dust is formed.Normal measures for preventive fire protection. For precautions see section 2.2. Conditions for safe storage, including any incompatibilities Store in cool place. Keep container tightly closed in a dry and well-ventilated place. Store under inert gas. Specific end use(s) A part from the uses mentioned in section 1.2 no other specific uses are stipulated SECTION 8: Exposure controls/personal protection Control parameters Components with workplace control parameters Exposure controls Appropriate engineering controls Handle in accordance with good industrial hygiene and safety practice. Wash hands before breaks and at the end of workday. Personal protective equipment Eye/face protection Safety glasses with side-shields conforming to EN166 Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU). Skin protection Handle with gloves. Gloves must be inspected prior to use. Use proper glove removal technique (without touching glove's outer surface) to avoid skin contact with this product. Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices. Wash and dry hands. The selected protective gloves have to satisfy the specifications of EU Directive 89/686/EEC and the standard EN 374 derived from it. Body Protection Complete suit protecting against chemicals, The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace. Respiratory protection For nuisance exposures use type P95 (US) or type P1 (EU EN 143) particle respirator.For higher level protection use type OV/AG/P99 (US) or type ABEK-P2 (EU EN 143) respirator cartridges. Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU). Control of environmental exposure Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Discharge into the environment must be avoided. SECTION 9: Physical and chemical properties Information on basic physical and chemical properties a) AppearanceForm: crystalline Colour: colourless b) Odourodourless c) Odour Thresholdno data available d) pHno data available e) Melting point/freezing111 - 112 °C - lit. point f) Initial boiling point and no data available boiling range g) Flash pointno data available h) Evapouration rateno data available i) Flammability (solid, gas) no data available j) Upper/lowerno data available flammability or explosive limits k) Vapour pressureno data available l) Vapour densityno data available m) Relative densityno data available n) Water solubility0,97 g/l at 20 °C o) Partition coefficient: n- log Pow: 3,69 octanol/water p) Auto-ignitionno data available temperature q) Decompositionno data available temperature r) Viscosityno data available s) Explosive propertiesno data available t) Oxidizing propertiesno data available Other safety information Bulk density1,37 kg/m3 at 20 °C SECTION 10: Stability and reactivity Reactivity no data available Chemical stability Stable under recommended storage conditions. Possibility of hazardous reactions no data available Conditions to avoid no data available Incompatible materials no data available Hazardous decomposition products Other decomposition products - no data available In the event of fire: see section 5 SECTION 11: Toxicological information Information on toxicological effects Acute toxicity LD50 Oral Oral - rat - 1.644 mg/kg LD50 Dermal - rat - > 5.000 mg/kg LD50 Subcutaneous - rat - 4.920 mg/kg Skin corrosion/irritation no data available Serious eye damage/eye irritation no data available Respiratory or skin sensitisation no data available Germ cell mutagenicity no data available Carcinogenicity IARC:No component of this product present at levels greater than or equal to 0.1% is identified as probable, possible or confirmed human carcinogen by IARC. Reproductive toxicity Laboratory experiments have shown teratogenic effects. Reproductive toxicity - rat - female - Oral Effects on Embryo or Fetus: Fetotoxicity (except death, e.g., stunted fetus). Specific Developmental Abnormalities: Musculoskeletal system. Specific target organ toxicity - single exposure no data available Specific target organ toxicity - repeated exposure no data available Aspiration hazard no data available Additional Information RTECS: KM5745000 To the best of our knowledge, the chemical, physical, and toxicological properties have not been thoroughly investigated. SECTION 12: Ecological information Toxicity Toxicity to fishLC50 - Oncorhynchus mykiss (rainbow trout) - 0,79 mg/l - 96 h Toxicity to daphnia and EC50 - Daphnia magna (Water flea) - 127 mg/l - 48 h other aquatic invertebrates Persistence and degradability BiodegradabilityResult: - Product is not persistent. Bioaccumulative potential no data available Mobility in soil no data available Results of PBT and vPvB assessment PBT/vPvB assessment not available as chemical safety assessment not required/not conducted Other adverse effects Very toxic to aquatic life. no data available SECTION 13: Disposal considerations Waste treatment methods Product Offer surplus and non-recyclable solutions to a licensed disposal company. Contact a licensed professional waste disposal service to dispose of this material. Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber. Contaminated packaging Dispose of as unused product. SECTION 14: Transport information UN number ADR/RID: 3077IMDG: 3077IATA: 3077 UN proper shipping name ADR/RID: ENVIRONMENTALLY HAZARDOUS SUBSTANCE, SOLID, N.O.S. (2-[[4-(2,4- Dichlorobenzoyl)-1,3-dimethyl-1H-pyrazol-5-yl]oxy]-1-phenylethanone) IMDG: ENVIRONMENTALLY HAZARDOUS SUBSTANCE, SOLID, N.O.S. (2-[[4-(2,4- Dichlorobenzoyl)-1,3-dimethyl-1H-pyrazol-5-yl]oxy]-1-phenylethanone) IATA:Environmentally hazardous substance, solid, n.o.s. (2-[[4-(2,4-Dichlorobenzoyl)-1,3-dimethyl- 1H-pyrazol-5-yl]oxy]-1-phenylethanone) Transport hazard class(es) ADR/RID: 9IMDG: 9IATA: 9 Packaging group ADR/RID: IIIIMDG: IIIIATA: III Environmental hazards ADR/RID: yesIMDG Marine pollutant: yesIATA: yes Special precautions for user Further information EHS-Mark required (ADR 2.2.9.1.10, IMDG code 2.10.3) for single packagings and combination packagings containing inner packagings with Dangerous Goods > 5L for liquids or > 5kg for solids. SECTION 15 - REGULATORY INFORMATION N/A SECTION 16 - ADDITIONAL INFORMATION N/A

毒性和生态

生态学数据: 通常对水是不危害的，若无政府许可，勿将材料排入周围环境。 CHEMICAL IDENTIFICATION RTECS NUMBER : KM5745000 CHEMICAL NAME : Ethanone, 2-((4-(2,4-dichlorobenzoyl)-1,3-dimethyl-1H-pyrazol-5 -yl)oxy)-1-phenyl- CAS REGISTRY NUMBER : 71561-11-0 LAST UPDATED : 199512 DATA ITEMS CITED : 13 MOLECULAR FORMULA : C20-H16-Cl2-N2-O3 MOLECULAR WEIGHT : 403.28 HEALTH HAZARD DATA ACUTE TOXICITY DATA TYPE OF TEST : LD50 - Lethal dose, 50 percent kill ROUTE OF EXPOSURE : Oral SPECIES OBSERVED : Rodent - rat DOSE/DURATION : 1644 mg/kg TOXIC EFFECTS : Details of toxic effects not reported other than lethal dose value REFERENCE : JPIFAN Japan Pesticide Information. (Japan Plant Protection Assoc., 1-43-11, Komagome, Toshima-ku, Tokyo 170, Japan) No.1-61, 1969-92. For publisher information, see AGJAEP. Volume(issue)/page/year: (45),24,1984 TYPE OF TEST : LC50 - Lethal concentration, 50 percent kill ROUTE OF EXPOSURE : Inhalation SPECIES OBSERVED : Rodent - rat DOSE/DURATION : >280 mg/m3 TOXIC EFFECTS : Details of toxic effects not reported other than lethal dose value REFERENCE : NNGADV Nippon Noyaku Gakkaishi. Journal of the Pesticide Science Society of Japan. (Nippon Noyaku Gakkai, 1-43-11, Komagome, Toshima-ku, Tokyo 170, Japan) V.1- 1976- Volume(issue)/page/year: 13,167,1988 TYPE OF TEST : LD50 - Lethal dose, 50 percent kill ROUTE OF EXPOSURE : Administration onto the skin SPECIES OBSERVED : Rodent - rat DOSE/DURATION : >5 gm/kg TOXIC EFFECTS : Details of toxic effects not reported other than lethal dose value REFERENCE : JPIFAN Japan Pesticide Information. (Japan Plant Protection Assoc., 1-43-11, Komagome, Toshima-ku, Tokyo 170, Japan) No.1-61, 1969-92. For publisher information, see AGJAEP. Volume(issue)/page/year: (45),24,1984 TYPE OF TEST : LD50 - Lethal dose, 50 percent kill ROUTE OF EXPOSURE : Intraperitoneal SPECIES OBSERVED : Rodent - rat DOSE/DURATION : 308 mg/kg TOXIC EFFECTS : Details of toxic effects not reported other than lethal dose value REFERENCE : NNGADV Nippon Noyaku Gakkaishi. Journal of the Pesticide Science Society of Japan. (Nippon Noyaku Gakkai, 1-43-11, Komagome, Toshima-ku, Tokyo 170, Japan) V.1- 1976- Volume(issue)/page/year: 13,167,1988 TYPE OF TEST : LD50 - Lethal dose, 50 percent kill ROUTE OF EXPOSURE : Subcutaneous SPECIES OBSERVED : Rodent - rat DOSE/DURATION : 4920 mg/kg TOXIC EFFECTS : Details of toxic effects not reported other than lethal dose value REFERENCE : NNGADV Nippon Noyaku Gakkaishi. Journal of the Pesticide Science Society of Japan. (Nippon Noyaku Gakkai, 1-43-11, Komagome, Toshima-ku, Tokyo 170, Japan) V.1- 1976- Volume(issue)/page/year: 13,167,1988 TYPE OF TEST : LD50 - Lethal dose, 50 percent kill ROUTE OF EXPOSURE : Oral SPECIES OBSERVED : Rodent - mouse DOSE/DURATION : >8450 mg/kg TOXIC EFFECTS : Details of toxic effects not reported other than lethal dose value REFERENCE : JPIFAN Japan Pesticide Information. (Japan Plant Protection Assoc., 1-43-11, Komagome, Toshima-ku, Tokyo 170, Japan) No.1-61, 1969-92. For publisher information, see AGJAEP. Volume(issue)/page/year: (45),24,1984 TYPE OF TEST : LD50 - Lethal dose, 50 percent kill ROUTE OF EXPOSURE : Intraperitoneal SPECIES OBSERVED : Rodent - mouse DOSE/DURATION : 659 mg/kg TOXIC EFFECTS : Details of toxic effects not reported other than lethal dose value REFERENCE : NNGADV Nippon Noyaku Gakkaishi. Journal of the Pesticide Science Society of Japan. (Nippon Noyaku Gakkai, 1-43-11, Komagome, Toshima-ku, Tokyo 170, Japan) V.1- 1976- Volume(issue)/page/year: 13,167,1988 TYPE OF TEST : LD50 - Lethal dose, 50 percent kill ROUTE OF EXPOSURE : Subcutaneous SPECIES OBSERVED : Rodent - mouse DOSE/DURATION : >8450 mg/kg TOXIC EFFECTS : Details of toxic effects not reported other than lethal dose value REFERENCE : NNGADV Nippon Noyaku Gakkaishi. Journal of the Pesticide Science Society of Japan. (Nippon Noyaku Gakkai, 1-43-11, Komagome, Toshima-ku, Tokyo 170, Japan) V.1- 1976- Volume(issue)/page/year: 13,167,1988 ** OTHER MULTIPLE DOSE TOXICITY DATA ** TYPE OF TEST : TDLo - Lowest published toxic dose ROUTE OF EXPOSURE : Oral SPECIES OBSERVED : Rodent - rat DOSE/DURATION : 420 mg/kg/4W-C TOXIC EFFECTS : Liver - changes in liver weight Nutritional and Gross Metabolic - weight loss or decreased weight gain REFERENCE : NNGADV Nippon Noyaku Gakkaishi. Journal of the Pesticide Science Society of Japan. (Nippon Noyaku Gakkai, 1-43-11, Komagome, Toshima-ku, Tokyo 170, Japan) V.1- 1976- Volume(issue)/page/year: 13,167,1988 TYPE OF TEST : TDLo - Lowest published toxic dose ROUTE OF EXPOSURE : Oral SPECIES OBSERVED : Rodent - rat DOSE/DURATION : 13104 mg/kg/2Y-C TOXIC EFFECTS : Liver - other changes Blood - changes in serum composition (e.g. TP, bilirubin, cholesterol) Blood - changes in leukocyte (WBC) count REFERENCE : NNGADV Nippon Noyaku Gakkaishi. Journal of the Pesticide Science Society of Japan. (Nippon Noyaku Gakkai, 1-43-11, Komagome, Toshima-ku, Tokyo 170, Japan) V.1- 1976- Volume(issue)/page/year: 13,167,1988 TYPE OF TEST : TDLo - Lowest published toxic dose ROUTE OF EXPOSURE : Oral SPECIES OBSERVED : Rodent - mouse DOSE/DURATION : 10080 mg/kg/4W-C TOXIC EFFECTS : Liver - fatty liver degeneration Kidney, Ureter, Bladder - changes in tubules (including acute renal failure, acute tubular necrosis) Endocrine - changes in spleen weight REFERENCE : NNGADV Nippon Noyaku Gakkaishi. Journal of the Pesticide Science Society of Japan. (Nippon Noyaku Gakkai, 1-43-11, Komagome, Toshima-ku, Tokyo 170, Japan) V.1- 1976- Volume(issue)/page/year: 13,167,1988 TYPE OF TEST : TDLo - Lowest published toxic dose ROUTE OF EXPOSURE : Oral SPECIES OBSERVED : Rodent - mouse DOSE/DURATION : 26208 mg/kg/2Y-C TOXIC EFFECTS : Liver - other changes Liver - changes in liver weight Kidney, Ureter, Bladder - other changes in urine composition REFERENCE : NNGADV Nippon Noyaku Gakkaishi. Journal of the Pesticide Science Society of Japan. (Nippon Noyaku Gakkai, 1-43-11, Komagome, Toshima-ku, Tokyo 170, Japan) V.1- 1976- Volume(issue)/page/year: 13,167,1988 ** REPRODUCTIVE DATA ** TYPE OF TEST : TDLo - Lowest published toxic dose ROUTE OF EXPOSURE : Oral DOSE : 50 mg/kg SEX/DURATION : female 6-15 day(s) after conception TOXIC EFFECTS : Reproductive - Maternal Effects - other effects Reproductive - Effects on Embryo or Fetus - fetotoxicity (except death, e.g., stunted fetus) Reproductive - Specific Developmental Abnormalities - musculoskeletal system REFERENCE : NNGADV Nippon Noyaku Gakkaishi. Journal of the Pesticide Science Society of Japan. (Nippon Noyaku Gakkai, 1-43-11, Komagome, Toshima-ku, Tokyo 170, Japan) V.1- 1976- Volume(issue)/page/year: 13,167,1988

安全

• 符号: GHS07, GHS09
• 信号词: Warning
• 危害声明: H302-H410
• 警示性声明: P301 + P312 + P330
• 危害码 (欧洲): Xn,N
• 风险声明 (欧洲): 22-50
• 安全声明 (欧洲): 61
• 危险品运输编码: UN 3077 9 / PGIII
• RTECS号: KM5745000

制备

1，3-二甲基－5-吡唑啉酮与碳酸钾在二氧六环中回流1h，然后与2，4-二氯苯甲酰氯回流反应2h，生成物再与α-溴代苯乙酮回流反应40min，得到92%苄草唑，或者上述生成物与乙腈、α-氯代苯乙酮、碳酸钾和碘化钾回流反应1h，也可制得苄草唑。