124-58-3 Usage
Chemical Properties
Different sources of media describe the Chemical Properties of 124-58-3 differently. You can refer to the following data:
1. Plates from EtOH or Me2CO.Sol in H
2O and EtOH.
2. White crystalline solid.
Uses
Methylarsonic acid is used as herbicide.
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)
Check Digit Verification of cas no
The CAS Registry Mumber 124-58-3 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 1,2 and 4 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 124-58:
(5*1)+(4*2)+(3*4)+(2*5)+(1*8)=43
43 % 10 = 3
So 124-58-3 is a valid CAS Registry Number.
InChI:InChI=1/CH5AsO2/c1-2(3)4/h2H,1H3,(H,3,4)
124-58-3Relevant articles and documents
Studies on the air oxidation of some arsenic(III) compounds
Sideris, Theodore D.,Ioannou, Panayiotis V.
, p. 751 - 762 (2006)
The air oxidation of As(III) oxides [(PhAsO)x and Ph 2As-O-AsPh2] and thioesters [Ph-As(SPh)2, Ph2As-SPh Me-As(SPh)2, Me2As-SPh], in chloroform and in methanol was studied. The air oxidation in chloroform was faster probably because the solubility of dioxygen is greater than in methanol, and it is favored by the electron-withdrawing phenyl groups bound to As(III). The products obtained were the arsonic or arsinic acids and diphenyl disulfide. In one case, diphenyl disulfide and thiophenol were produced. The results can be rationalized by assuming first hydrolysis of the As(III) compounds to arsonous or arsinous acids followed by their oxidation to arsonic and arsinic acids, which should involve the binding of dioxygen to As(III). The other hypothesis assumes first the binding of dioxygen to As(III) of these oxides and thioesters followed by the decomposition of the adducts. The binding of the ground state dioxygen to As(III) may have biochemical implications for toxicity or chemotherapy of arsenic(III) compounds. Copyright Taylor & Francis Group, LLC.
Microorganisms for the production of methacrylic acid
-
, (2012/08/28)
The invention provides a non-naturally occurring microbial organism having a 2-hydroxyisobutyric acid, 3-hydroxyisobutyric acid or methacrylic acid pathway. The microbial organism contains at least one exogenous nucleic acid encoding an enzyme in a 2-hydroxyisobutyric acid, 3-hydroxyisobutyric acid or methacrylic acid pathway. The invention additionally provides a method for producing 2-hydroxyisobutyric acid, 3-hydroxyisobutyric acid or methacrylic acid. The method can include culturing a 2-hydroxyisobutyric acid, 3-hydroxyisobutyric acid or methacrylic acid producing microbial organism expressing at least one exogenous nucleic acid encoding a 2-hydroxyisobutyric acid, 3-hydroxyisobutyric acid or methacrylic acid pathway enzyme in a sufficient amount and culturing under conditions and for a sufficient period of time to produce 2-hydroxyisobutyric acid, 3-hydroxyisobutyric acid or methacrylic acid.
METHOD FOR ANALYZING PSA, AND A METHOD FOR DISTINGUISHING PROSTATE CANCER FROM PROSTATIC HYPERTROPHY USING THAT METHOD FOR ANALYZING PSA
-
, (2012/11/13)
A method for distinguishing prostate cancer from prostatic hypertrophy using the method for analyzing PSA and an analysis kit of PSA are provided. An object of the present invention can be solved by being brought into contact a lectin having an affinity for β-N-acetylgalactosamine residues with a sample possibly containing PSA, to determine an amount of PSA having an affinity for the lectin. A method for distinguishing prostate cancer from prostatic hypertrophy can be provided by this method.
