メチルオキソジヒドロキシアルソラン 化学特性,用途語,生産方法
外観
白色～微褐色の結晶または結晶性粉末
溶解性
水、エタノールに易溶。エーテルに不溶。水溶液は強い酸性を示す。
解説
メチルアルソン酸．亜ヒ酸ナトリウムとクロロメタンとを反応させると得られる．分解点130 ℃．水和物は白色の結晶．融点113～116 ℃．pK1 3.61，pK2 8.25．水，エタノールに可溶，エーテルに不溶．塩化水素と二酸化硫黄を作用させるとジクロロ(メチル)アルシンを与える．金属イオンの沈殿剤，ワタ畑，芝生，非農耕地用除草剤として用いられる．LD50 700 mg/kg(ラット，経口)．
用途
有機合成用。
説明
Salts of methanearsonic acid,CH3AsO(OH)2, especially the iron ammonium salt, Neoasozin, used as a fungicide in rice growing and the sodium, ammonium, and diethanolam monium salts used as herbicides in cotton growing.
化学的特性
Plates from EtOH or Me2CO.Sol in H
2O and EtOH.
使用
Methylarsonic acid is used as herbicide.
危険性
Moderately toxic by ingestion.
職業ばく露
Methanearsonic acid is an organoarsenic herbicide.
輸送方法
UN3465 Organoarsenic compound, solid, n.o.s.,
Hazard Class: 6.1; Labels: 6.1-Poisonous materials,
Technical Name Required.
純化方法
Recrystallise this herbicide from Me2CO or absolute EtOH (white plates; its solubility is 28g/100mL EtOH). [Quick & Adams J Am Chem Soc 44 809 1922, Beilstein 4 H 613, 4 I 577, 4 II 996, 4 III 1822, 4 IV 3682.]
不和合性
A strong acid. Incompatible with
caustics, ammonia, amines, amides, organic anhydrides,
isocyanates, vinyl acetate, alkylene oxides, epichlorohydrin.
May not be compatible with nitrates. Moisture may cause
hydrolysis or other forms of decomposition. Attacks metals
in the presence of moisture
廃棄物の処理
Do not discharge into drains
or sewers. Dispose of waste material as hazardous waste
using a licensed disposal contractor to an approved landfill.
Consult with environmental regulatory agencies for guidance on acceptable disposal practices. If allowed,
Incineration with effluent gas scrubbing is recommended.
Containers must be disposed of properly by following package label directions or by contacting your local or federal
environmental control agency, or by contacting your
regional EPA office. Chemical Treatability of Arsenic—
(1) Concentration Process: Chemical Precipitation;
Chemical Classification: Metal; Scale of Study: Pilot Scale;
Type of Wastewater Used: Domestic Wastewater1Pure
Compound; Results of Study: 5 ppm @ 4 gpm @ pH 5 7.0.
Iron system—90% reduction; low lime system—80%
reduction; high lime system—76% reduction; (3 coagulant
systems were used; Iron system used 45 ppm as Fe of
Fe2(SO4)3 @ pH 5 6.0. Low lime system used 20 ppm
Fe of Fe2(SO4)3 and 260 ppm of CaO @ pH 5 10.0. High
line system used 600 ppm of CaO @ pH 5 11.5.
Chemical coagulation was followed by multimedia filtration); (2) Concentration Process: Chemical Precipitation;
Chemical Classification: Metal; Scale of Study: Full Scale Continuous Flow; Type of Wastewater Used: Domestic
Wastewater; Results of Study: Effluent character (ppb):
2.5, 56% reduction with lime; 3.3, 24% reduction with
lime; (lime dose of 350400 ppm as calcium oxide @
pH 5 11.3)
メチルオキソジヒドロキシアルソラン 上流と下流の製品情報
原材料
準備製品