**** SECTION 2 - COMPOSITION, INFORMATION ON INGREDIENTS ****
+----------------+--------------------------------------+----------+-----------+
| CAS# | Chemical Name | % | EINECS# |
|----------------|--------------------------------------|----------|-----------|
| 7784-46-5 |Sodium arsenite | >95 | 232-070-5 |
+----------------+--------------------------------------+----------+-----------+
Hazard Symbols: T N
Risk Phrases: 23/25 45 50/53
**** SECTION 3 - HAZARDS IDENTIFICATION ****
EMERGENCY OVERVIEW
Toxic by inhalation and if swallowed. May cause cancer. Very toxic
to aquatic organisms, may cause long-term adverse effects in the
aquatic environment.
Potential Health Effects
Eye:
Causes eye irritation.
Skin:
Causes skin irritation. May be fatal if absorbed through the skin.
Exposure to arsenic compounds may produce hyperpigmentation of the
skin and hyperkeratoses of plantar and palmar surfaces as well as
both primary irritation and sensitization types.
Ingestion:
May be fatal if swallowed. Poison by ingestion. Causes
gastrointestinal irritation with nausea, vomiting and diarrhea. All
soluble arsenic (As) compounds are considered to be poisonous to
humans. Inorganic arsenic is more toxic than organic arsenic.
Organic arsenic is excreted more rapidly than inorganic arsenic.
Arsenic 5+ is excreted more rapidly than arsenic 3+.
Inhalation:
Causes respiratory tract irritation. Inhalation of arsenic compounds
may lead to irritation of the respiratory tract and to possible nasal
perforation. Long-term exposure to arsenic compounds may produce
impairment of peripheral circulation.
Chronic:
Prolonged or repeated skin contact may cause dermatitis. Inorganic
arsenic compounds may cause skin and lung cancers in humans.
**** SECTION 4 - FIRST AID MEASURES ****
Eyes:
In case of contact, immediately flush eyes with plenty of water for
at least 15 minutes. Get medical aid.
Skin:
In case of contact, immediately flush skin with plenty of water for
at least 15 minutes while removing contaminated clothing and shoes.
Get medical aid immediately. Wash clothing before reuse.
Ingestion:
Call a poison control center. If swallowed, do not induce vomiting
unless directed to do so by medical personnel. Never give anything by
mouth to an unconscious person. Get medical aid.
Inhalation:
If inhaled, remove to fresh air. If not breathing, give artificial
respiration. If breathing is difficult, give oxygen. Get medical aid.
Notes to Physician:
Treat symptomatically and supportively.
**** SECTION 5 - FIRE FIGHTING MEASURES ****
General Information:
As in any fire, wear a self-contained breathing apparatus in
pressure-demand, MSHA/NIOSH (approved or equivalent), and full
protective gear. Substance is noncombustible.
Extinguishing Media:
Use agent most appropriate to extinguish fire.
**** SECTION 6 - ACCIDENTAL RELEASE MEASURES ****
General Information: Use proper personal protective equipment as indicated
in Section 8.
Spills/Leaks:
Vacuum or sweep up material and place into a suitable disposal
container. Clean up spills immediately, observing precautions in the
Protective Equipment section. Wear a self contained breathing
apparatus and appropriate personal protection. (See Exposure
Controls, Personal Protection section). Avoid generating dusty
conditions. Provide ventilation. Evacuate unnecessary personnel.
U.S. regulations require reporting spills and releases to soil, water
and air in excess of reportable quantities. Do not let this chemical
enter the environment.
**** SECTION 7 - HANDLING and STORAGE ****
Handling:
Wash thoroughly after handling. Wash hands before eating. Remove
contaminated clothing and wash before reuse. Do not get in eyes, on
skin, or on clothing. Do not breathe dust. Use only with adequate
ventilation or respiratory protection. Change contaminated clothing
promptly. Do not take working clothes home.
Storage:
Store in a cool, dry place. Store in a tightly closed container.
Store protected from moisture.
**** SECTION 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION ****
Engineering Controls:
Facilities storing or utilizing this material should be equipped
with an eyewash facility and a safety shower. Use adequate general or
local exhaust ventilation to keep airborne concentrations below the
permissible exposure limits. See 29CFR 1910.1018 for regulatory
requirements pertaining to all occupational exposures to inorganic
arsenic.
Exposure Limits
CAS# 7784-46-5:
United Kingdom, WEL - TWA: (listed as arsenic compounds, n.o.s.):
mg/m3 TWA (except arsine, as As)
United Kingdom, WEL - STEL: (listed as arsenic compounds, n.o.s.)
0.3 mg/m3 STEL (except arsine, as As)
United States OSHA: 0.5 mg/m3 TWA (listed under Arsenic).5 ??g/m3
Action Level (as As); 10 ??g/m3 PEL (as As. Cancer hazard - see 2
CFR 1 910.1018. Arsine excepted) (listed under Arsenic, inorgani
compounds).
Belgium - TWA: (listed as arsenic): 0.01 mg/m3 VLE
Japan: (listed as arsenic compounds, n.o.s.): 3 ??g/m3 OEL (refere
value, as As)
Malaysia: (listed as arsenic): 0.01 mg/m3 TWA
Netherlands: (listed as arsenic, inorganic compounds): 0.1 mg/m3
(as As)
Netherlands: (listed as arsenic): 0.050 mg/m3 MAC
Russia: (listed as arsenic, inorganic compounds): 0.04 mg/m3 TWA
As)
Russia: (listed as arsenic, inorganic compounds): 0.01 mg/m3 STEL
As)
Spain: (listed as arsenic compounds, n.o.s.): 0.1 mg/m3 VLA-ED (a
As)
Personal Protective Equipment
Eyes:
Wear appropriate protective eyeglasses or chemical
safety goggles as described by OSHA's eye and face
protection regulations in 29 CFR 1910.133 or European
Standard EN166.
Skin:
Wear appropriate protective gloves to prevent skin
exposure.
Clothing:
Wear appropriate protective clothing to prevent skin
exposure.
Respirators:
Follow the OSHA respirator regulations found in 29
CFR 1910.134 or European Standard EN 149. Use a
NIOSH/MSHA or European Standard EN 149 approved
respirator if exposure limits are exceeded or if
irritation or other symptoms are experienced.
**** SECTION 9 - PHYSICAL AND CHEMICAL PROPERTIES ****
Physical State: Solid
Color: white to gray white
Odor: odorless
pH: basic in solution
Vapor Pressure: Not applicable.
Viscosity: Not applicable.
Boiling Point: Decomposes
Freezing/Melting Point: 615 deg C
Autoignition Temperature: Not available.
Flash Point: Not applicable.
Explosion Limits, lower: N/A
Explosion Limits, upper: N/A
Decomposition Temperature: Not available.
Solubility in water: Soluble.
Specific Gravity/Density: 1.87
Molecular Formula: NaAsO2
Molecular Weight: 129.91
**** SECTION 10 - STABILITY AND REACTIVITY ****
Chemical Stability:
Stable. Absorbs carbon dioxide from the air.
Conditions to Avoid:
Moisture, extreme temperatures.
Incompatibilities with Other Materials:
Strong acids.
Hazardous Decomposition Products:
Oxides of arsenic.
Hazardous Polymerization: Has not been reported
**** SECTION 11 - TOXICOLOGICAL INFORMATION ****
RTECS#:
CAS# 7784-46-5: CG3675000
LD50/LC50:
CAS# 7784-46-5: Oral, rat: LD50 = 41 mg/kg; Skin, rat: LD50 = 150
mg/kg.
Carcinogenicity:
Sodium arsenite -
California: carcinogen, initial date 2/27/87 (listed as Arsenic, inorg
NTP: Known carcinogen (listed as Arsenic, inorganic compounds).
IARC: Group 1 carcinogen (listed as Arsenic).
Other:
See actual entry in RTECS for complete information.
**** SECTION 12 - ECOLOGICAL INFORMATION ****
Ecotoxicity:
Arsenic compounds tend to be accumulated by oysters and other
shellfish.
**** SECTION 13 - DISPOSAL CONSIDERATIONS ****
Dispose of in a manner consistent with federal, state, and local regulations.
**** SECTION 14 - TRANSPORT INFORMATION ****
IATA
No information available.
IMO
No information available.
RID/ADR
No information available.
USA RQ: CAS# 7784-46-5: 1 lb final RQ; 0.454 kg final RQ
**** SECTION 15 - REGULATORY INFORMATION ****
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: T N
Risk Phrases:
R 45 May cause cancer.
R 23/25 Toxic by inhalation and if swallowed.
R 50/53 Very toxic to aquatic organisms, may cause
long-term adverse effects in the aquatic environment.
Safety Phrases:
S 20/21 When using do not eat, drink or smoke.
S 28 After contact with skin, wash immediately
with...
S 45 In case of accident or if you feel unwell, seek
medical advice immediately (show the label where
possible).
S 60 This material and its container must be
disposed of as hazardous waste.
S 61 Avoid release to the environment. Refer to
special instructions/safety data sheets.
WGK (Water Danger/Protection)
CAS# 7784-46-5: 3
Canada
CAS# 7784-46-5 is listed on Canada's DSL List.
CAS# 7784-46-5 is listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 7784-46-5 is listed on the TSCA inventory.
**** SECTION 16 - ADDITIONAL INFORMATION ****
MSDS Creation Date: 11/07/2001 Revision #5 Date: 1/07/2003
The information above is believed to be accurate and represents the best
information currently available to us. However, we make no warranty of
merchantability or any other warranty, express or implied, with respect to
such information, and we assume no liability resulting from its use. Users
should make their own investigations to determine the suitability of the
information for their particular purposes. In no way shall the company be
liable for any claims, losses, or damages of any third party or for lost
profits or any special, indirect, incidental, consequential or exemplary
damages, howsoever arising, even if the company has been advised of
the possibility of such damages.
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