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Phenylarsonic acid

Phenylarsonic acid structure

Phenylarsonic acid 

structure
  • CAS No:

    98-05-5

  • Formula:

    C6H7AsO3

  • Chemical Name:

    Phenylarsonic acid

  • Synonyms:

    Arsonic acid,As-phenyl-;Benzenearsonic acid;Arsonic acid,phenyl-;As-Phenylarsonic acid;Phenylarsonic acid;Monophenylarsonic acid;NSC 15566

Description

white to slightly yellow crystalline powder Benzenearsonic acid is a colorless, crystalline powder.


Phenylarsonic acid is the chemical compound with the formula C6H5AsO(OH)2, commonly abbreviated PhAsO3H2. This colourless solid is an organic derivative of arsenic acid, AsO(OH)3, where one OH group has been replaced by a phenyl group. The compound is a buffering agent and a precursor to other organoarsenic compounds, some of which are used in animal nutrition, e.g. 4-hydroxy-3-nitrobenzenearsonic acid.


Benzenearsonic acid is a colorless solid. Used as an analytical reagent for tin. (EPA, 1998)|COLOURLESS SOLID IN VARIOUS FORMS.


Benzenearsonic acid is a colorless solid. Used as an analytical reagent for tin. (EPA, 1998)|Phenylarsonic acid is an organoarsonic acid and a member of arsonic acids. It is a conjugate acid of a phenylarsonate(1-).

Phenylarsonic acid Basic Attributes

202.04000

202.04

202-631-9

57F9KU116M

0223

15566

3280|3465|1557

DTXSID6059158

Crystal powder

29310099

Characteristics

57.53000

0.06 (LogP)

Benzenearsonic acid is a colorless solid. Used as an analytical reagent for tin. (EPA, 1998)

1.760 g/cm3 @ Temp: 25 °C

158 °C (decomp)

66 °C @ Press: 1 Torr

232.9ºC

31.6g/L(28 ºC)

LDLo orl-rat: 50 mg/kg JPETAB 93,287,48

pKa= 8.48 in water at 25 °C

No rapid reaction with air. No rapid reaction with water.

Acids, Weak

Benzenearsonic acid emits poisonous fumes of arsenic when heated to decomposition. [EPA, 1998].

Safety Information

III

6.1

3280

R50/53

S61-S60-S45-S28A-S20/21

CY3150000

N-T

Separated from food and feedstuffs. Dry. Ventilation along the floor.

P261, P264, P270, P271, P301+P310, P304+P340, P311, P321, P330, P403+P233, P405, P501

H301

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

UN 3280

Benzenearsonic acid emits poisonous fumes of arsenic when heated to decomposition. (EPA, 1998)|Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.

|Danger|H301 (97.83%): Toxic if swallowed [Danger Acute toxicity, oral]|P261, P264, P270, P271, P273, P301+P310, P304+P340, P311, P321, P330, P391, P403+P233, P405, and P501|Aggregated GHS information provided by 46 companies from 4 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.|H301: Toxic if swallowed [Danger Acute toxicity, oral]|P261, P264, P270, P271, P301+P310, P304+P340, P311, P321, P330, P403+P233, P405, and P501

(Non-Specific -- Arsenical Compound, Solid, n.o.s.) Use water in flooding quantities as fog. Avoid breathing dusts and fumes; keep upwind; wear self-contained breathing apparatus. (Non-Specific -- Arsenical Compound, Solid, n.o.s.) This material does not burn or burns with difficulty. Extinguish fire using agent suitable for surrounding fire. (EPA, 1998)|In case of fire in the surroundings, use appropriate extinguishing media.

Excerpt from ERG Guide 151 [Substances - Toxic (Non-combustible)]: As an immediate precautionary measure, isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids. SPILL: See ERG Table 1 - Initial Isolation and Protective Action Distances on the UN/NA 3280 datasheet. FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2016)

(Non-Specific -- Arsenic Compound, Solid, n.o.s.) Keep unnecessary people away; isolate hazard area and deny entry. Stay upwind; keep out of low areas. Do not touch spilled material; stop leak if you can do it without risk. Small spills: take up with sand or other noncombustible absorbent material and place into containers for later disposal. Small dry spills: with clean shovel place material into clean, dry container and cover; move containers from spill area. Large spills: dike far ahead of spill for later disposal. (EPA, 1998)

For emergency situations, wear a positive pressure, pressure-demand, full facepiece self-contained breathing apparatus (SCBA) or pressure- demand supplied air respirator with escape SCBA and a fully-encapsulating, chemical resistant suit. (EPA, 1998)

Permissible Exposure Limit: Table Z-1 8-Hr Time Weighted Avg: 0.5 mg/cu m. /Arsenic, organic cmpd (as As)/

Personal protection: complete protective clothing including self-contained breathing apparatus. Do NOT wash away into sewer. Sweep spilled substance into covered sealable containers. Carefully collect remainder. Then store and dispose of according to local regulations.

Separated from food and feedstuffs. Dry.

Evaporation at 20 °C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed, especially if powdered.

PREVENT DISPERSION OF DUST! IN ALL CASES CONSULT A DOCTOR!

Use closed system or ventilation.

Protective gloves. Protective clothing.

Wear safety goggles or eye protection in combination with breathing protection.

(a) The owner or operator of an existing glass melting furnace subject to the provisions of this subpart shall comply with either paragraph (a)(1) or (a)(2) of this section ... (1) Uncontrolled total arsenic emissions from the glass melting furnace shall be less than 2.5 Mg (2.7 ton) per year, or ... (2) Total arsenic emissions from glass melting furnace shall be conveyed to a control device and reduced by at least 85%. /Total arsenic/|(b) The owner or operator of a new or modified glass melting furnace subject to the provisions of this subpart shall comply with either paragraph (b)(1) or (b)(2) of this section ... (1) Uncontrolled total arsenic emissions from the glass melting furnace shall be less than 0.4 Mg (0.44 ton) per year, or ... (2) Total arsenic emissions from glass melting furnace shall be conveyed to a control device and reduced by at least 85%. /Total arsenic/|The owner or operator of each copper converter subject to the provisions of this subpart shall reduce inorganic arsenic emissions to the atmosphere by meeting the following design, equipment, work practice, and operational requirements: (1) Install, operate, and maintain a secondary hood system on each copper converter. Each secondary hood system shall consist of a hood enclosure, air curtain fan(s), exhaust system fan(s), and ductwork that conveys the captured emission to a control device ... (2) Optimize the capture of secondary inorganic arsenic emission by operating the copper converter and secondary hood systems at all times ... . /Inorganic arsenic/

D004; A waste containing arsenic may or may not be characterized as a hazardous waste following testing by the Toxicity Characteristic Leaching Procedure as prescribed by the Resource Conservation and Recovery Act (RCRA) regulations. /Arsenic/

Releases of CERCLA hazardous substances are subject to the release reporting requirement of CERCLA section 103, codified at 40 CFR part 302, in addition to the requirements of 40 CFR part 355. Benzenearsonic acid is an extremely hazardous substance (EHS) subject to reporting requirements when stored in amounts in excess of its threshold planning quantity (TPQ) of 10 or 10,000 lbs. Extremely hazardous substances that are solids are subject to either of two threshold planning quantities ... The lower quantity applies only if the solid exists in powdered for and has a particle size less than 100 microns; or is handled in solution or in molten form; or meets the criteria for a National Fire Protection Association (NFPA) rating of 2, 3 or 4 for reactivity. If the solid does not meet any of these criteria, it is subject to the upper ... threshold planning quantity ... .

Toxicity

LD50 Mouse oral 270 ug/kg|LD50 Rabbit iv 16 mg/kg

Drug Information

WHEN GIVEN ORALLY, CONSIDERABLE PERCENTAGE IS EXCRETED IN FECES, INDICATING THAT PHENYLARSONIC COMPD ARE POORLY ABSORBED BY INTESTINAL TRACT. THAT PROP WHICH IS ABSORBED, HOWEVER IS APPARENTLY EXCRETED RAPIDLY BY THE KIDNEYS.

Benzenearsonic acid is a deadly poison. (Non-Specific -- Arsenic Compounds) Chronic exposure to arsenic compounds can cause dermatitis and digestive disorders. Renal damage may develop. (EPA, 1998)

Warning: Effects usually appear within 30 minutes of exposure but may be delayed for several hours. Caution is advised. Signs and Symptoms of Benzenearsonic Acid Exposure: Dehydration, intense thirst, difficulty swallowing, vomiting, abdominal pain, headache, and diarrhea are among the first signs and symptoms noticed following acute benzenearsonic acid exposure. Exposure to airborne dust is generally accompanied by irritation of exposed skin, eyes, and mucous membranes. Conjunctivitis (red, inflamed eyes), runny nose, and lacrimation (tearing) are common. Pulmonary edema may also occur. Garlic odor of breath and feces may be noted. Cardiovascular effects include shock, hypotension (low blood pressure) , tachycardia (rapid heart rate), ventricular fibrillation, and other cardiac abnormalities. Altered mental status, seizures, and delirium are further complications of benzenearsonic acid exposure. Intense muscle cramping is common. Emergency Life-Support Procedures: Acute exposure to benzenearsonic acid may require decontamination and life support for the victims. Emergency personnel should wear protective clothing appropriate to the type and degree of contamination. Air-purifying or supplied-air respiratory equipment should also be worn, as necessary. Rescue vehicles should carry supplies such as plastic sheeting and disposable plastic bags to assist in preventing spread of contamination. Inhalation Exposure: 1. Move victims to fresh air. Emergency personnel should avoid self-exposure to benzenearsonic acid. 2. Evaluate vital signs including pulse and respiratory rate, and note any trauma. If no pulse is detected, provide CPR. If not breathing, provide artificial respiration. If breathing is labored, administer oxygen or other respiratory support. 3. Obtain authorization and/or further instructions from the local hospital for administration of an antidote or performance of other invasive procedures. 4. RUSH to a health care facility! Dermal/Eye Exposure: 1. Remove victims from exposure. Emergency personnel should avoid self-exposure to benzenearsonic acid. 2. Evaluate vital signs including pulse and respiratory rate, and note any trauma. If no pulse is detected, provide CPR. If not breathing, provide artificial respiration. If breathing is labored, administer oxygen or other respiratory support. 3. Remove and isolate contaminated clothing as soon as possible. 4. If eye exposure has occurred, eyes must be flushed with lukewarm water for at least 15 minutes. 5. Wash exposed skin areas thoroughly with soap and water. 6. RUSH to a health care facility! Ingestion Exposure: 1. Evaluate vital signs including pulse and respiratory rate, and note any trauma. If no pulse is detected, provide CPR. If not breathing, provide artificial respiration. If breathing is labored, administer oxygen or other respiratory support. 2. Obtain authorization and/or further instructions from the local hospital for administration of an antidote or performance of other invasive procedures. 3. Vomiting may be induced with syrup of Ipecac. If elapsed time since ingestion of benzenearsonic acid is unknown or suspected to be greater than 30 minutes, do not induce vomiting and proceed to Step 4. Ipecac should not be administered to children under 6 months of age.Warning: Ingestion of benzenearsonic acid may result in sudden onset of seizures or loss of consciousness. Syrup of Ipecac should be administered only if victims are alert, have an active gag-reflex, and show no signs of impending seizure or coma. If ANY uncertainty exists, proceed to Step 4.The following dosages of Ipecac are recommended: children up to 1 year old, 10 mL (1/3 oz); children 1 to 12 years old, 15 mL (1/2 oz); adults, 30 mL (1 oz). Ambulate (walk) the victims and give large quantities of water. If vomiting has not occurred after 15 minutes, Ipecac may be readministered. Continue to ambulate and give water to the victims. If vomiting has not occurred within 15 minutes after second administration of Ipecac, administer activated charcoal. 4. Activated charcoal may be administered if victims are conscious and alert. Use 15 to 30 g (1/2 to 1 oz) for children, 50 to 100 g (1-3/4 to 3-1/2 oz) for adults, with 125 to 250 mL (1/2 to 1 cup) of water. 5. Promote excretion by administering a saline cathartic or sorbitol to conscious and alert victims. Children require 15 to 30 g (1/2 to 1 oz) of cathartic; 50 to 100 g (1-3/4 to 3-1/2 oz) is recommended for adults. 6. RUSH to a health care facility! (EPA, 1998)


Fresh air, rest. Refer for medical attention.


Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention .


Rinse with plenty of water for several minutes (remove contact lenses if easily possible). Refer for medical attention.

Toxic by ingestion.

benzenearsonic acid

The substance can be absorbed into the body by inhalation and by ingestion.

Abdominal pain. Confusion. Diarrhoea. Dizziness. Drowsiness. Headache. Vomiting. Incoordination. Paralysis. Symptoms may be delayed.


Further see Inhalation.

Phenylarsonic acid Use and Manufacturing

Methods of Manufacturing

Reaction of the diazonium salt and sodium arsenite.

Uses

Reagent for tin.

Arsonic acid, As-phenyl-: ACTIVE

Computed Properties

Molecular Weight:202.04
Hydrogen Bond Donor Count:2
Hydrogen Bond Acceptor Count:3
Rotatable Bond Count:1
Exact Mass:201.961114
Monoisotopic Mass:201.961114
Topological Polar Surface Area:57.5
Heavy Atom Count:10
Complexity:145
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

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