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MSDS 
:
 3-Nitrobenzenesulfonic Acid, Sodium Salt, 99%
CAS 
:
 127-68-4
SYNONYMS 
:
 Ludigo; Benzenesulfonic Acid
**** SECTION 2 - COMPOSITION, INFORMATION ON INGREDIENTS ****

+----------------+--------------------------------------+----------+-----------+
| CAS# | Chemical Name | % | EINECS# |
|----------------|--------------------------------------|----------|-----------|
| 127-68-4 |M-nitrobenzenesulfonic acid, sodium sa| 99.0 | 204-857-3 |
+----------------+--------------------------------------+----------+-----------+
Hazard Symbols: XI
Risk Phrases: 36 43

**** SECTION 3 - HAZARDS IDENTIFICATION ****

EMERGENCY OVERVIEW
Irritating to eyes. May cause sensitization by skin
contact.Hygroscopic (absorbs moisture from the air).

Potential Health Effects
Eye:
Causes eye irritation.
Skin:
May cause mild skin irritation. Exposure may cause dermatitis and
sensitization.
Ingestion:
May cause digestive tract disturbances. Expected to be a low
ingestion hazard. Ingestion of nitrate containing compounds can lead
to methemoglobinemia.
Inhalation:
May cause respiratory tract irritation.
Chronic:
Prolonged exposure may cause anemia and methemoglobinemia,
characterized by dizziness, drowsiness, headache, breath shortness,
cyanosis (bluish skin due to deficient oxygenation of the blood),
rapid heart rate and chocolate-brown colored blood.

**** SECTION 4 - FIRST AID MEASURES ****

Eyes:
Flush eyes with plenty of water for at least 15 minutes,
occasionally lifting the upper and lower eyelids. Get medical aid.
Skin:
Flush skin with plenty of water for at least 15 minutes while
removing contaminated clothing and shoes. Get medical aid if
irritation develops or persists. Wash clothing before reuse. Remove
contaminated clothing and shoes.
Ingestion:
If victim is conscious and alert, give 2-4 cupfuls of milk or water.
Never give anything by mouth to an unconscious person. Get medical
aid. Wash mouth out with water.
Inhalation:
Remove from exposure and move to fresh air immediately. If not
breathing, give artificial respiration. If breathing is difficult,
give oxygen. Get medical aid.
Notes to Physician:
For methemoglobinemia, administer oxygen alone or with Methylene
Blue depending on the methemoglobin concentration in the blood.
Antidote:
Methylene blue, alone or in combination with oxygen is indicated as
a treatment in nitrite induced methemoglobinemia.

**** 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. During a fire, irritating and highly toxic gases
may be generated by thermal decomposition or combustion.
Extinguishing Media:
Use water spray, dry chemical, carbon dioxide, or chemical foam. 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. Avoid generating dusty conditions.
Provide ventilation.

**** SECTION 7 - HANDLING and STORAGE ****

Handling:
Use only in a well-ventilated area. Minimize dust generation and
accumulation. Avoid breathing dust, vapor, mist, or gas. Avoid
contact with eyes, skin, and clothing. Keep container tightly
closed.
Storage:
Store in a tightly closed container. Store in a cool, dry,
well-ventilated area away from incompatible substances. 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 process enclosure,
local exhaust ventilation, or other engineering controls to control
airborne levels.
Exposure Limits
CAS# 127-68-4:


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 clothing to prevent skin exposure.
Respirators:
Wear a NIOSH/MSHA or European Standard EN 149
approved full-facepiece airline respirator in the
positive pressure mode with emergency escape
provisions. A NIOSH/MSHA approved air purifying dust
or mist respirator or European Standard EN 149.

**** SECTION 9 - PHYSICAL AND CHEMICAL PROPERTIES ****

Physical State: Solid
Color: slightly yellow
Odor: none reported
pH: Not available.
Vapor Pressure: Not available.
Viscosity: Not available.
Boiling Point: Not available.
Freezing/Melting Point: 350 deg C
Autoignition Temperature: 355 deg C ( 671.00 deg F)
Flash Point: > 100 deg C (> 212.00 deg F)
Explosion Limits, lower: N/A
Explosion Limits, upper: N/A
Decomposition Temperature:
Solubility in water: 200 G/L Water (20C)
Specific Gravity/Density:
Molecular Formula: C6H4NO5SNa
Molecular Weight: 225.15

**** SECTION 10 - STABILITY AND REACTIVITY ****

Chemical Stability:
Stable at room temperature in closed containers under normal storage
and handling conditions.
Conditions to Avoid:
Incompatible materials, exposure to moist air or water, dust.
Incompatibilities with Other Materials:
Brass, copper, nickel, moisture, cadmium.
Hazardous Decomposition Products:
Nitrogen oxides, carbon monoxide, oxides of sulfur, carbon dioxide.
Hazardous Polymerization: Has not been reported.

**** SECTION 11 - TOXICOLOGICAL INFORMATION ****

RTECS#:
CAS# 127-68-4: DB7195000
LD50/LC50:
CAS# 127-68-4: Draize test, rabbit, eye: 20 mg/24H Moderate; Draize
test, rabbit, skin: 500 mg/24H Mild; Oral, rat: LD50 = 11 gm/kg.
Carcinogenicity:
M-nitrobenzenesulfonic acid, sodium salt -
Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.

**** SECTION 12 - ECOLOGICAL INFORMATION ****

Ecotoxicity:
Fish: Bluegill/Sunfish: LC50 = <1350 mg/L; 96 Hr.; UnspecifiedWater
flea Daphnia: EC50 = 8665 mg/L; 48 Hr.; Unspecified

**** SECTION 13 - DISPOSAL CONSIDERATIONS ****

Dispose of in a manner consistent with federal, state, and local regulations.

**** SECTION 14 - TRANSPORT INFORMATION ****

IATA
Not regulated as a hazardous material.
IMO
Not regulated as a hazardous material.
RID/ADR
Not regulated as a hazardous material.

**** SECTION 15 - REGULATORY INFORMATION ****

European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: XI
Risk Phrases:
R 36 Irritating to eyes.
R 43 May cause sensitization by skin contact.
Safety Phrases:
S 24 Avoid contact with skin.
S 26 In case of contact with eyes, rinse immediately
with plenty of water and seek medical advice.
S 37 Wear suitable gloves.
WGK (Water Danger/Protection)
CAS# 127-68-4: 1
Canada
CAS# 127-68-4 is listed on Canada's DSL List.
CAS# 127-68-4 is listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 127-68-4 is listed on the TSCA inventory.

**** SECTION 16 - ADDITIONAL INFORMATION ****

MSDS Creation Date: 6/17/1999 Revision #2 Date: 3/18/2003

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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