NILE
CHEMICALS
NILE
CHEMICALS
Section
1: Chemical Product and Company Identification
Product
Name: Sodium hydrosulfite
CAS#:
7775-14-6
Synonym:
Blankit; Burmol; Hydros;
Hydrosulfite R Conc;V-Brite B; Vatrolite; Sodium Dithionite; Sodium
Hyposulfite;Disodium dithionite; Disodium hydrosulfite
Chemical
Name: Dithionous acid,
disodium salt
Chemical
Formula: Na2S2O4
Section
2: Composition and Information on Ingredients
Composition:
Name
CAS #
% by Weight
Sodium
hydrosulfite
7775-14-6
100
Toxicological
Data on Ingredients: Sodium
hydrosulfite: ORAL (LD50): Acute: >500 mg/kg [Rat]. DERMAL (LD50):
Acute:& gt;10000 mg/kg [Rabbit].
Section
3: Hazards Identification
Potential
Acute Health Effects:Hazardous
in case of eye contact (irritant), of ingestion. Slightly hazardous in case of
skin contact (irritant), of inhalation.
Potential
Chronic Health Effects:CARCINOGENIC
EFFECTS: Not available. MUTAGENIC EFFECTS: Not available. TERATOGENIC EFFECTS:
Not available.
DEVELOPMENTAL
TOXICITY: Not available. Repeated or prolonged exposure is not known to
aggravate medical condition.
Section
4: First Aid Measures
Eye
Contact:Check for and
remove any contact lenses. In case of contact, immediately flush eyes with
plenty of water for at least 15 minutes. Cold water may be used. Get medical
attention.
Skin
Contact:Wash with soap and
water. Cover the irritated skin with an emollient. Get medical attention if
irritation develops. Cold water may be used.
Serious
Skin Contact: Not
available.
Inhalation:If
inhaled, remove to fresh air. If not breathing, give artificial respiration. If
breathing is difficult, give oxygen. Get medical attention.
Serious
Inhalation:Evacuate the
victim to a safe area as soon as possible. Loosen tight clothing such as a
collar, tie, belt or waistband. If breathing is difficult, administer oxygen. If
the victim is not breathing, perform mouth-to-mouth resuscitation. Seek medical
attention.
Ingestion:Do
NOT induce vomiting unless directed to do so by medical personnel. Never give
anything by mouth to an unconscious person. If large quantities of this material
are swallowed, call a physician immediately. Loosen tight clothing such as a
collar, tie, belt or waistband.
Serious
Ingestion: Not available.
Section
5: Fire and Explosion Data
Flammability
of the Product: Flammable.
Auto-Ignition
Temperature: Not
available.
Flash
Points: Not available.
Flammable
Limits: Not available.
Products
of Combustion: Some
metallic oxides.
Fire
Hazards in Presence of Various Substances:
Highly
flammable in presence of open flames and sparks, of heat. Slightly flammable to
flammable in presence of moisture. Non-flammable in presence of shocks.
Explosion
Hazards in Presence of Various Substances:
Risks
of explosion of the product in presence of mechanical impact: Not available.
Risks of explosion of the product in presence of static discharge: Not
available.
Fire
Fighting Media and Instructions:
Flammable
solid. Spontaneously combustible material. Do not use water or foam. SMALL FIRE:
Use DRY chemical powder. LARGE FIRE: Use DRY chemical powder. Use water spray or
fog. Cool containing vessels with water jet in order to prevent pressure
build-up, autoignition or explosion.
Special
Remarks on Fire Hazards:
Burns
slowly, about like sulfur. Heats spontaneously in contact with moisture and air.
May ignite nearby combustible materials. Vigourously supports combustion. Sodium
Dithionite + Sodium Chlorite causes ignition of the latter. Reacts on exposure
to moist air form toxic and corrosive fumes with the generation of heat and risk
of combustion.
Special
Remarks on Explosion Hazards: Not
available.
Section
6: Accidental Release Measures
Small
Spill: Use appropriate
tools to put the spilled solid in a convenient waste disposal container.
Large
Spill:Spontaneously
combustible solid. Oxidizing material. Stop leak if without risk. Do not get
water inside container. Avoid contact with a combustible material (wood, paper,
oil, clothing...). Keep substance damp using water spray. Do not touch spilled
material. Use water spray curtain to divert vapor drift. Cover with dry earth,
sand or other non-combustible material. Prevent entry into sewers, basements or
confined areas. Prevent entry into sewers, basements or confined areas; dike if
needed. Eliminate all ignition sources. Call for assistance on disposal.
Section
7: Handling and Storage
Precautions:Keep
away from heat. Keep away from sources of ignition. Keep away from direct
sunlight or strong incandescent light. Ground all equipment containing material.
Do not ingest. Do not breathe dust. Avoid contact with eyes. Avoid shock and
friction. Wear suitable protective clothing. If ingested, seek medical advice
immediately and show the container or the label. Keep away from incompatibles
such as oxidizing agents, acids, moisture.
Storage:Store
in a segregated and approved area. Keep in a cool and ventilated area away from
combustible materials. Keep container in a cool, well-ventilated area. Keep
container tightly closed and sealed until ready for use. Separate from acids,
alkalies, reducing agents and combustibles. Avoid all possible sources of
ignition (spark or flame).
Section
8: Exposure Controls/Personal Protection
Engineering
Controls:Use process
enclosures, local exhaust ventilation, or other engineering controls to keep
airborne levels below recommended exposure limits. If user operations generate
dust, fume or mist, use ventilation to keep exposure to airborne contaminants
below the exposure limit.
Personal
Protection:Splash goggles.
Lab coat. Dust respirator. Be sure to use an approved/certified respirator or
equivalent. Gloves.
Personal
Protection in Case of a Large Spill:Splash
goggles. Full suit. Dust respirator. Boots. Gloves. A self contained breathing
apparatus should be used to avoid inhalation of the product. Suggested
protective clothing might not be sufficient; consult a specialist BEFORE
handling this product.
Exposure
Limits: Not available.
Section
9: Physical and Chemical Properties
Physical
state and appearance: Solid.
(Solid powder.)
Odor:
Characteristic. Sulfurous. (Slight.)
Taste:
Not available.
Molecular
Weight: 174.11 g/mole
Color:
White. Grayish white.
pH
(1% soln/water): Not
available.
Boiling
Point: Not available.
Melting
Point: Decomposition
temperature: 20°C (68°F)
Critical
Temperature: Not
available.
Specific
Gravity: 0.8 - 1.02(Water
= 1)
Vapor
Pressure: Not applicable.
Vapor
Density: Not available.
Volatility:
Not available.
Odor
Threshold: Not available.
Water/Oil
Dist. Coeff.: Not
available.
Ionicity
(in Water): Not available.
Dispersion
Properties: See solubility
in water.
Solubility:
Soluble in cold water.
Slightly soluble in alcohol.
Section
10: Stability and Reactivity Data
Stability:
The product is stable.
Instability
Temperature: Not
available.
Conditions
of Instability: Heat
(above 50 deg. C) moisture, air, moist air, incompatible materials.
Incompatibility
with various substances:
Reactive
with acids, moisture. The product may undergo hazardous decomposition,
condensation or polymerization, it may react violently with water to emit toxic
gases or it may become self-reactive under conditions of shock or increase in
temperature or pressure.
Corrosivity:
Non-corrosive in presence
of glass.
Special
Remarks on Reactivity:
Air
sensitive. Oxidizes in air(more readily so in the presence of moisture or when
in solution) to bisulfite and aquires an acid reaction. It is a strong reducing
agent and reacts violently with oxidants. Reacts with acids to form sulfur
oxides. Thermal decompositon occurs violently at 190 deg. C. Avoid contact wtih
oxidizing agents such as peroxides, potassium chlorate, and potassium
permanganate. .
Special
Remarks on Corrosivity: Not
available.
Polymerization:
Will not occur.
Section
11: Toxicological Information
Routes
of Entry: Inhalation.
Ingestion.
Toxicity
to Animals:
Acute
oral toxicity (LD50): >500 mg/kg [Rat]. Acute dermal toxicity (LD50):
>10000 mg/kg [Rabbit].
Chronic
Effects on Humans: Not
available.
Other
Toxic Effects on Humans:
Hazardous
in case of ingestion. Slightly hazardous in case of skin contact (irritant), of
inhalation.
Special
Remarks on Toxicity to Animals: Not
available.
Special
Remarks on Chronic Effects on Humans: Not
available.
Special
Remarks on other Toxic Effects on Humans:
Acute
Potential Health Effects: Skin: Causes skin irritation. Contact dermatitis may
develop in sensitive individuals. Causes eye irritation and possible eye damage.
Inhalation: It can irritate the respiratory tract (nose, throat, lungs)and cause
wheezing, and/or shortness of breath. Ingestion: May be harmful if ingested. It
can cause gastrointestinal tract irritation with nausea, abdominal pain,
vomiting, and diarrhea. It may also affect behavior/central nervous system and
cause headache, irritability, restlessness, and convulsions. Ingestion of large
amounts may also cause hypotension, and cardiovascular collapse.
Hypersensitivity reactions, occurring more frequently in asthmatics, may produce
bronchoconstriction, diaphoresis, flushing, tachypnea, dyspnea, rhinorrhea,
urticaria, tachycardia, hypotension and anaphylaxis. Chronic Potential Health
Effects: Skin: Prolonged contact may cause skin irritation.
Section
12: Ecological Information
Ecotoxicity:
Not available.
BOD5
and COD: Not available.
Products
of Biodegradation:
Possibly
hazardous short term degradation products are not likely. However, long term
degradation products may arise.
Toxicity
of the Products of Biodegradation: The
products of degradation are less toxic than the product itself.
Special
Remarks on the Products of Biodegradation: Not
available.
Section
13: Disposal Considerations
Waste
Disposal:
Waste
must be disposed of in accordance with federal, state and local environmental
control regulations.
Section
14: Transport Information
DOT
Classification: CLASS 4.2:
Spontaneously combustible substance.
Identification:
: Sodium dithionate UNNA:
1384 PG: II
Special
Provisions for Transport: Not
available.
Section
15: Other Regulatory Information
Other
Regulations: EINECS: This
product is on the European Inventory of Existing Commercial Chemical Substances.
Other
Classifications:
WHMIS
(Canada):
CLASS
B-6: Reactive and very flammable material. CLASS F: Dangerously reactive
material.
DSCL
(EEC):
R7-
May cause fire. R22- Harmful if swallowed. R31- Contact with acids liberates
toxic gas. S7/8- Keep container tightly closed and dry. S26- In case of contact
with eyes, rinse immediately with plenty of water and seek medical advice. S28-
After contact with skin, wash immediately with plenty of water. S43- In case of
fire, never use water.
HMIS
(U.S.A.):
Health
Hazard: 2
Fire
Hazard: 3
Reactivity:
2
Personal
Protection: E
National
Fire Protection Association (U.S.A.):
Health:
2
Flammability:
1
Reactivity:
2
Specific
hazard:
Protective
Equipment:
Gloves.
Lab coat. Dust respirator. Be sure to use an approved/certified respirator or
equivalent. Wear appropriate respirator when ventilation is inadequate. Splash
goggles.
NILE CEHMCIALS provides the information contained herein
in good faith but makes no representation as to its comprehensiveness or
accuracy. This document is intended only as a guide to the appropriate
precautionary handling of the material by a properly trained person using this
product. Individuals receiving the information must exercise their independent
judgment in determining its appropriateness for a particular purpose. NILE
CHEMICALS MAKES NO REPRESENTATIONS OR WARRANTIES, EITHER EXPRESS OR IMPLIED,
INCLUDING WITHOUT LIMITATION ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE WITH RESPECT TO THE INFORMATION SET FORTH HEREIN OR THE
PRODUCT TO WHICH THE INFORMATION REFERS. ACCORDINGLY, NILE CHEMICALS WILL NOT BE
RESPONSIBLE FOR DAMAGES RESULTING FROM USE OF OR RELIANCE UPON THIS INFORMATION.
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