Basic information Safety Supplier Related

METHYLARSONIC ACID

Basic information Safety Supplier Related

METHYLARSONIC ACID Basic information

Product Name:
METHYLARSONIC ACID
Synonyms:
  • monomethylarsonicacid
  • METHYLARSONIC ACID
  • Arsonic acid, methyl-
  • Kyselina methylarsonova
  • kyselinamethylarsonova
  • Methanearsonic acid
  • methanearsonicacid
  • methanearsonicacid(maa)
CAS:
124-58-3
MF:
CH5AsO3
MW:
139.97
EINECS:
204-705-6
Product Categories:
  • Aliphatics
  • Intermediates & Fine Chemicals
  • Pharmaceuticals
Mol File:
124-58-3.mol
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METHYLARSONIC ACID Chemical Properties

Melting point:
161°
Boiling point:
393.3±25.0 °C(Predicted)
form 
solid
pka
pK1:3.41;pK2:8.18 (18°C)
Water Solubility 
218.8g/L(25 ºC)
IARC
2B (Vol. 100C) 2012
EPA Substance Registry System
Methylarsonic acid (124-58-3)
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Safety Information

RIDADR 
2759
HazardClass 
6.1(b)
PackingGroup 
III
Hazardous Substances Data
124-58-3(Hazardous Substances Data)
Toxicity
mouse,LD50,oral,1800mg/kg (1800mg/kg),Journal of Agricultural and Food Chemistry. Vol. 45, Pg. 449, 1997.
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METHYLARSONIC ACID Usage And Synthesis

Description

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.

Chemical Properties

White crystalline solid.

Chemical Properties

Plates from EtOH or Me2CO.Sol in H 2O and EtOH.

Uses

Methylarsonic acid is used as herbicide.

Definition

ChEBI: Methylarsonic acid is a member of arsonic acids, a one-carbon compound and an organoarsonic acid. It is a conjugate acid of a methylarsonate(1-).

Hazard

Moderately toxic by ingestion.

Potential Exposure

Methanearsonic acid is an organoarsenic herbicide.

Shipping

UN3465 Organoarsenic compound, solid, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required.

Purification Methods

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.]

Incompatibilities

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

Waste Disposal

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)

METHYLARSONIC ACIDSupplier

Shandong Ono Chemical Co., Ltd.
Tel
0539-6362799 20)
Energy Chemical
Tel
021-58432009 400-005-6266
Email
marketing1@energy-chemical.com
Shaanxi Dideu Medichem Co. Ltd
Tel
029-61856358 15229202216
Email
1020@dideu.com
Tel
4008-099-669
Email
23419001name@qq.com
Henan Tianfu Chemical Co.,Ltd.
Tel
+86-0371-55170693 +86-19937530512
Email
info@tianfuchem.com