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Monosodium methanearsonate

Monosodium methanearsonate structure

Monosodium methanearsonate 

structure
  • CAS No:

    2163-80-6

  • Formula:

    CH5AsO3.Na

  • Chemical Name:

    Monosodium methanearsonate

  • Synonyms:

    Arsonic acid,methyl-,monosodium salt;Methanearsonic acid,monosodium salt;Ansar 529;Ansar 170;Ansar 170L;Monosodium acid methanearsonate;Monosodium acid metharsonate;Monosodium methanearsonate;Monosodium methylarsonate;MSMA;Daconate;Sodium acid methanearsonate;Weed 108;Gepiron;Bueno 6

  • Categories:

    Agrochemicals  >  Herbicides

Description

White solid. Very solu- ble in water. Colorless solid or colorless to red or green solution. Odorless. Specific Gravity: (DSMA) 1.0 @ 20C; (MSMA solutions) 1.4°1.6 @ 20°C (liquid);

Monosodium methanearsonate Basic Attributes

161.95

161.92700

218-495-9

Characteristics

60.36000

-3.1 (LogP)

Methanearsonic acid, [sodium salt] appears as odorless colorless solid. Solution may be red or green. Solid may float or sink in water; solid and solution mix with water. (USCG, 1999)

1.5

130-140 °C

393.3ºC at 760 mmHg

205.8ºC

H2O: >=10 g/100 mL at 22 ºC

SOLID FORMULATIONS ARE SOMEWHAT HYGROSCOPIC & SHOULD BE STORED IN DRY PLACE. /METHANEARSONIC ACID/

1X10-5 Pa @ 25 deg C (7.8X10-8 mm Hg)

Oral-rat LD50: 700 mg/kg

Thermal decomposition of toxic arsenide gas

None

Safety Information

III

6.1(b)

UN 1557

22-50/53-23/25

20/21-28-45-60-61

PA2625000

Xn,N,T

The warehouse is ventilated, low temperature and dry; stored and transported separately from food materials

STABLE TO HYDROLYSIS

Missing Phrase - N15.00950417-P261-P304 + P340 + P312-P403 + P233

H301 + H331-H410

Toxicity

moderately toxic

Monosodium methanearsonate Use and Manufacturing

Postemergence herbicide for grassy weeds.

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