SAFETY DATA SHEET

1. Identification
Product identifier Sulfur, Molten
Other means of identification
SDS number 602-GHS
Synonyms Sulfur - Molten, Molten Sulfur
See section 16 for complete information.
Recommended use Refinery feedstock.
Recommended restrictions None known.
Manufacturer/Importer/Supplier/Distributor information
Manufacturer/Supplier Valero Marketing & Supply Company and Affiliates
One Valero Way
San Antonio, TX 78269-6000
General Assistance 210-345-4593
E-Mail CorpHSE@valero.com
Contact Person Industrial Hygienist
Emergency Telephone 24 Hour Emergency 866-565-5220
1-800-424-9300 (CHEMTREC USA)

2. Hazard(s) identification
Physical hazards Flammable solids Category 2

Health hazards Acute toxicity, inhalation Category 3

Skin corrosion/irritation Category 2
Specific target organ toxicity, single exposure Category 3 respiratory tract irritation
Environmental hazards Hazardous to the aquatic environment, acute Category 3
hazard
Hazardous to the aquatic environment, Category 3
long-term hazard
OSHA defined hazards Not classified.

Label elements

Signal word Danger

Hazard statement Flammable solid. Causes skin irritation. Causes eye irritation. Toxic if inhaled. May cause
respiratory irritation.
Precautionary statement
Prevention Keep away from heat/sparks/open flames/hot surfaces. - No smoking. Ground/bond container and
receiving equipment. Use explosion-proof electrical/ventilating/lighting equipment. Wear
protective gloves/eye protection/face protection. Avoid breathing dust/fume/gas/mist/vapors/spray.
Use only outdoors or in a well-ventilated area. Wash thoroughly after handling.
Response In case of fire: Use foam, carbon dioxide, dry powder or water fog for extinction. If inhaled:
Remove person to fresh air and keep comfortable for breathing. Call a poison center/doctor. If in
eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy
to do. Continue rinsing. If eye irritation persists: Get medical advice/attention. If on skin: Wash
with plenty of water. If skin irritation occurs: Get medical advice/attention. Take off contaminated
clothing and wash before re-use.
Storage Store in a well-ventilated place. Keep container tightly closed. Store locked up.
Disposal Dispose of contents/container in accordance with local/regional/national/international regulations.

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Hazard(s) not otherwise None known.
classified (HNOC)
Supplemental information None.

3. Composition/information on ingredients
Mixtures
Chemical name CAS number %
Sulfur 7704-34-9 99 - 100

Hydrogen sulfide 7783-06-4 0-1

4. First-aid measures
Inhalation Move to fresh air. If breathing is difficult, give oxygen. If not breathing, give artificial respiration. Get
medical attention.
Skin contact Remove contaminated clothing and shoes. Wash off immediately with soap and plenty of water.
Get medical attention if irritation develops or persists. Wash clothing separately before reuse.
Destroy or thoroughly clean contaminated shoes.
If burned by contact with hot material, cool molten material adhering to skin as quickly as possible
with water, and see a physician for removal of adhering material and treatment of burn.
Eye contact Immediately flush eyes with plenty of water for at least 15 minutes. Remove contact lenses, if
present and easy to do. Continue rinsing. Get medical attention. If molten material contacts the
eye, immediately flush with plenty of water for at least 15 minutes. Get medical attention
immediately.
Ingestion Rinse mouth thoroughly. Do not induce vomiting without advice from poison control center. Do not
give mouth-to-mouth resuscitation. If vomiting occurs, keep head low so that stomach content
does not get into the lungs. Never give anything by mouth to a victim who is unconscious or is
having convulsions. Get medical attention immediately.
Most important Molten material will produce thermal burns. Causes skin, eye and respiratory tract irritation.
symptoms/effects, acute and Persons with pre-existing respiratory tract, skin and lung (such as asthma) disorders may be
delayed aggravated by exposure to this product. Hydrogen sulfide, a highly toxic gas, may be present.
Signs and symptoms of overexposure to hydrogen sulfide include respiratory and eye irritation,
dizziness, nausea, coughing, a sensation of dryness and pain in the nose, and loss of
consciousness. Odor does not provide a reliable indicator of the presence of hazardous levels in
the atmosphere.
Indication of immediate Burns should be treated as thermal burns.
medical attention and special In case of shortness of breath, give oxygen. Keep victim warm. Keep victim under observation.
treatment needed Symptoms may be delayed.
General information If exposed or concerned: get medical attention/advice. Ensure that medical personnel are aware of
the material(s) involved, and take precautions to protect themselves. Show this safety data sheet
to the doctor in attendance. Wash contaminated clothing before re-use.

5. Fire-fighting measures
Suitable extinguishing media Water spray. Water fog. Dry chemical powder. Carbon dioxide (CO2).
Unsuitable extinguishing Do not use a solid water stream as it may scatter and spread fire.
media
Specific hazards arising from Contact with molten material may cause thermal burns.
the chemical
Special protective equipment Wear full protective clothing, including helmet, self-contained positive pressure or pressure
and precautions for firefighters demand breathing apparatus, protective clothing and face mask.
Fire fighting Wear full protective clothing, including helmet, self-contained positive pressure or pressure
equipment/instructions demand breathing apparatus, protective clothing and face mask. Fight fire from maximum distance
or use unmanned hose holders or monitor nozzles. Move containers from fire area if you can do it
without risk. In the event of fire, cool tanks with water spray.

6. Accidental release measures

Personal precautions, Keep unnecessary personnel away. Local authorities should be advised if significant spills cannot
protective equipment and be contained. Keep upwind. Keep out of low areas. Ventilate closed spaces before entering. Do
emergency procedures not touch damaged containers or spilled material unless wearing appropriate protective clothing.
See Section 8 of the SDS for Personal Protective Equipment.

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Methods and materials for ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area).
containment and cleaning up Extinguish all flames in the vicinity. Keep combustibles (wood, paper, oil, etc.) away from spilled
material.

Large Spills: Stop the flow of material, if this is without risk. Dike spill for later disposal.

Small Spills: Sweep or shovel up material and place in a clearly labeled container for waste.
Following product recovery, flush area with water. Prevent product from entering drains. Do not
allow material to contaminate ground water system. Clean surface thoroughly to remove residual
contamination.
Environmental precautions If facility or operation has an "oil or hazardous substance contingency plan", activate its
procedures. Stay upwind and away from spill. Wear appropriate protective equipment including
respiratory protection as conditions warrant. Do not enter or stay in area unless monitoring
indicates that it is safe to do so. Isolate hazard area and restrict entry to emergency crew.
Combustible dust. Review Firefighting Measures, Section 5, before proceeding with clean up.
Keep all sources of ignition (flames , smoking, flares, etc.) and hot surfaces away from release.
Contain spill in smallest possible area. Recover as much product as possible (e.g. by vacuuming).
Stop leak if it can be done without risk. Spilled material may be absorbed by an appropriate
absorbent, and then handled in accordance with environmental regulations. Prevent spilled
material from entering sewers, storm drains, other unauthorized treatment or drainage systems
and natural waterways. Contact fire authorities and appropriate federal, state and local agencies. If
spill of any amount is made into or upon navigable waters, the contiguous zone, or adjoining
shorelines, contact the National Response Center at 1-800-424-8802. For highway or railways
spills, contact Chemtrec at 1-800-424-9300.

7. Handling and storage

Precautions for safe handling Wear personal protective equipment. Do not breathe dust or vapor. Do not get in eyes, on skin, on
clothing. Do not taste or swallow. Avoid prolonged exposure. Use only with adequate ventilation.
Wash thoroughly after handling. DO NOT handle, store or open near an open flame, sources of
heat or sources of ignition. Protect material from direct sunlight. Take precautionary measures
against static discharges. All equipment used when handling the product must be grounded. Use
non-sparking tools and explosion-proof equipment. When using, do not eat, drink or smoke. Avoid
release to the environment.
Conditions for safe storage, Do not handle or store near an open flame, heat or other sources of ignition. Keep container tightly
including any incompatibilities closed in a cool, well-ventilated place. Keep away from food, drink and animal feedingstuffs. Keep
out of the reach of children.

8. Exposure controls/personal protection

Occupational exposure limits
US. OSHA Table Z-2 (29 CFR 1910.1000)

Components Type Value

Hydrogen sulfide (CAS Ceiling 20 ppm
7783-06-4)
ACGIH

Material Type Value Form

Sulfur, Molten (CAS TWA 0.5 mg/m3 (total dust)
Mixture)
US. ACGIH Threshold Limit Values

Components Type Value

Hydrogen sulfide (CAS STEL 5 ppm
7783-06-4)
TWA 1 ppm
US. NIOSH: Pocket Guide to Chemical Hazards

Components Type Value

Hydrogen sulfide (CAS Ceiling 15 mg/m3
7783-06-4)
10 ppm
Biological limit values No biological exposure limits noted for the ingredient(s).
Exposure guidelines No exposure standards allocated.

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Appropriate engineering Provide adequate general and local exhaust ventilation. Use process enclosures, local exhaust
controls ventilation, or other engineering controls to control airborne levels below recommended exposure
limits. It is recommended that all dust control equipment such as local exhaust ventilation and
material transport systems involved in handling of this product contain explosion relief vents or an
explosion suppression system or an oxygen deficient environment. Ensure that dust-handling
systems (such as exhaust ducts, dust collectors, vessels, and processing equipment) are
designed in a manner to prevent the escape of dust into the work area (i.e., there is no leakage
from the equipment). Use only appropriately classified electrical equipment and powered industrial
trucks.
Individual protection measures, such as personal protective equipment
Eye/face protection Safety glasses. Wear a face shield when working with molten material.
Skin protection
Hand protection Wear protective gloves. When material is heated, wear gloves to protect against thermal burns.

Skin protection
Other Wear chemical-resistant, impervious gloves. Full body suit and boots are recommended when
handling large volumes or in emergency situations. Heat resistant/insulated gloves and clothing
are recommended when working with molten material.
Respiratory protection Use a properly fitted, air-purifying or air-fed respirator complying with an approved standard if a
risk assessment indicates this is necessary. Respirator selection must be based on known or
anticipated exposure levels, the hazards of the product and the safe working limits of the selected
respirator. If workplace exposure limits for product or components are exceeded, NIOSH approved
equipment should be worn. Proper respirator selection should be determined by adequately
trained personnel, based on the contaminants, the degree of potential exposure and published
respiratory protection factors. This equipment should be available for nonroutine and emergency
use.
Thermal hazards When material is heated, wear gloves to protect against thermal burns.
General hygiene Consult supervisor for special handling instructions. Do not breathe dust. Keep away from food
considerations and drink. Wash hands before breaks and immediately after handling the product. Provide
eyewash station and safety shower. Handle in accordance with good industrial hygiene and safety
practice.

9. Physical and chemical properties

Appearance Yellow solid.
Physical state Solid, Liquid.
Form Molten solid.
Color Yellow.
Odor Sulfurous.
Odor threshold Not available.
pH Not available.
Melting point/freezing point 246.2 °F (119 °C)
Initial boiling point and boiling 832.28 °F (444.6 °C)
range
Flash point 404.3 °F (206.9 °C)
Evaporation rate Not applicable.
Flammability (solid, gas) Flammable solid.
Upper/lower flammability or explosive limits
Flammability limit - lower 35 g/m3
(%)
Flammability limit - upper 1400 g/m3
(%)
Explosive limit - lower (%) Not available.
Explosive limit - upper (%) Not available.
Vapor pressure Not applicable.
Vapor density Not applicable.
Relative density Not available.
Solubility(ies)
Solubility (water) Very slightly soluble.

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Partition coefficient No data available.
(n-octanol/water)
Auto-ignition temperature 449.33 °F (231.85 °C)
Decomposition temperature Not available.
Viscosity Not applicable.

10. Stability and reactivity

Reactivity Not available.
Chemical stability Stable under normal temperature conditions and recommended use.
Possibility of hazardous Hazardous polymerization does not occur.
reactions
Conditions to avoid Heat. Ignition sources. Keep away from combustible material.
Incompatible materials Strong oxidizing agents.
Hazardous decomposition Sulfur oxides. Hydrogen sulfide.
products

11. Toxicological information

Information on likely routes of exposure
Inhalation Toxic if inhaled. May cause respiratory tract irritation.
Skin contact Molten material will produce thermal burns. Causes skin irritation.
Eye contact Molten material will produce thermal burns. Causes eye irritation.
Ingestion Molten material will produce thermal burns. Ingestion may cause irritation and malaise.
Symptoms related to the Contact with molten material may cause thermal burns. Causes skin, eye and respiratory tract
physical, chemical and irritation. Signs and symptoms of overexposure to hydrogen sulfide include respiratory and eye
toxicological characteristics irritation, dizziness, nausea, coughing, a sensation of dryness and pain in the nose, and loss of
consciousness.
Information on toxicological effects
Acute toxicity Molten material will produce thermal burns. Toxic if inhaled. Causes skin, eye and respiratory tract
irritation.
Skin corrosion/irritation Causes skin irritation.
Serious eye damage/eye Causes eye irritation.
irritation
Respiratory or skin sensitization
Respiratory sensitization Not classified.
Skin sensitization Not classified.
Germ cell mutagenicity Not classified.
Carcinogenicity Not classified.
IARC Monographs. Overall Evaluation of Carcinogenicity
Not listed.
NTP Report on Carcinogens
Not listed.
OSHA Specifically Regulated Substances (29 CFR 1910.1001-1050)
Not regulated.
Reproductive toxicity Not classified.
Specific target organ toxicity - May cause respiratory irritation.
single exposure
Specific target organ toxicity - Not classified.
repeated exposure
Aspiration hazard Not applicable.

12. Ecological information

Ecotoxicity Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment
due to trace amounts of Hydrogen Sulfide(H2S).
Persistence and degradability No data available.
Bioaccumulative potential No data available.
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Mobility in soil Not available.
Other adverse effects Not available.

13. Disposal considerations

Disposal instructions Dispose in accordance with all applicable regulations. Do not allow this material to drain into
sewers/water supplies. Do not contaminate ponds, waterways or ditches with chemical or used
container.
Local disposal regulations Dispose of in accordance with local regulations.
Hazardous waste code Not assigned.
Waste from residues / unused Dispose in accordance with all applicable regulations.
products
Contaminated packaging Since emptied containers may retain product residue, follow label warnings even after container is
emptied. Offer rinsed packaging material to local recycling facilities.

14. Transport information

DOT
UN number NA2448
UN proper shipping name Sulfur, molten
Transport hazard class(es)
Class 9
Subsidiary risk -
Label(s) 9
Packing group III
Special precautions for user Not available.
Special provisions 30, IB3, T1, TP3
Packaging exceptions None
Packaging non bulk 213
Packaging bulk 247
IATA
UN number UN2448
UN proper shipping name Sulphur, molten
Transport hazard class(es)
Class 4.1
Subsidiary risk -
Packing group Not applicable.
Environmental hazards No.
ERG Code 3L
Special precautions for user Not available.
IMDG
UN number UN2448
UN proper shipping name SULPHUR, MOLTEN
Transport hazard class(es)
Class 4.1
Subsidiary risk -
Packing group III
Environmental hazards
Marine pollutant No.
EmS F-A, S-H
Special precautions for user Not available.
Transport in bulk according to This product is a liquid and when transported in bulk is covered under MARPOL 73/78 Annex II.
Annex II of MARPOL 73/78 and This product is listed in the IBC Code.
the IBC Code Ship type: 3
Pollution category: Z

15. Regulatory information

US federal regulations This product is a "Hazardous Chemical" as defined by the OSHA Hazard Communication Standard
29 CFR 1910.1200 (OSHA) and 8 CCR § 5194 (Cal/OSHA).
All components are on the U.S. EPA TSCA Inventory List.
TSCA Section 12(b) Export Notification (40 CFR 707, Subpt. D)
Not regulated.

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 OSHA Specifically Regulated Substances (29 CFR 1910.1001-1050)
Not regulated.
CERCLA Hazardous Substance List (40 CFR 302.4)
Hydrogen sulfide (CAS 7783-06-4) LISTED
Superfund Amendments and Reauthorization Act of 1986 (SARA)
Hazard categories Immediate Hazard - Yes
Delayed Hazard - No
Fire Hazard - Yes
Pressure Hazard - No
Reactivity Hazard - No
SARA 302 Extremely hazardous substance
Chemical name CAS number Reportable Threshold Threshold Threshold
quantity planning quantity planning quantity, planning quantity,
(pounds) (pounds) lower value upper value
(pounds) (pounds)
Hydrogen sulfide 7783-06-4 100 500
SARA 311/312 Hazardous No
chemical
SARA 313 (TRI reporting)
Not regulated.

Other federal regulations

Clean Air Act (CAA) Section 112 Hazardous Air Pollutants (HAPs) List
Not regulated.
Clean Air Act (CAA) Section 112(r) Accidental Release Prevention (40 CFR 68.130)
Hydrogen sulfide (CAS 7783-06-4)
Safe Drinking Water Act Not regulated.
(SDWA)
US state regulations This product does not contain a chemical known to the State of California to cause cancer, birth
defects or other reproductive harm.
US. Massachusetts RTK - Substance List
Hydrogen sulfide (CAS 7783-06-4)
Sulfur (CAS 7704-34-9)
US. New Jersey Worker and Community Right-to-Know Act
Hydrogen sulfide (CAS 7783-06-4)
Sulfur (CAS 7704-34-9)
US. Pennsylvania Worker and Community Right-to-Know Law
Hydrogen sulfide (CAS 7783-06-4)
Sulfur (CAS 7704-34-9)
US. Rhode Island RTK
Hydrogen sulfide (CAS 7783-06-4)
US. California Proposition 65
Not Listed.
International Inventories
Country(s) or region Inventory name On inventory (yes/no)*
Australia Australian Inventory of Chemical Substances (AICS) Yes
Canada Domestic Substances List (DSL) Yes
Canada Non-Domestic Substances List (NDSL) No
China Inventory of Existing Chemical Substances in China (IECSC) Yes
Europe European Inventory of Existing Commercial Chemical Yes
Substances (EINECS)
Europe European List of Notified Chemical Substances (ELINCS) No
Japan Inventory of Existing and New Chemical Substances (ENCS) Yes
Korea Existing Chemicals List (ECL) Yes
New Zealand New Zealand Inventory Yes
Philippines Philippine Inventory of Chemicals and Chemical Substances Yes
(PICCS)

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 Country(s) or region Inventory name On inventory (yes/no)*
United States & Puerto Rico Toxic Substances Control Act (TSCA) Inventory Yes
*A "Yes" indicates this product complies with the inventory requirements administered by the governing country(s).
A "No" indicates that one or more components of the product are not listed or exempt from listing on the inventory administered by the governing
country(s).

16. Other information, including date of preparation or last revision

Issue date 12-February-2013
Revision date 16-October-2015
Version # 05
NFPA ratings
2
2 0

Disclaimer This material Safety Data Sheet (SDS) was prepared in accordance with 29 CFR 1910.1200 by
Valero Marketing & Supply Co., ("VALERO"). VALERO does not assume any liability arising out of
product use by others. The information, recommendations, and suggestions presented in this SDS
are based upon test results and data believed to be reliable. The end user of the product has the
responsibility for evaluating the adequacy of the data under the conditions of use, determining the
safety, toxicity and suitability of the product under these conditions, and obtaining additional or
clarifying information where uncertainty exists. No guarantee expressed or implied is made as to
the effects of such use , the results to be obtained, or the safety and toxicity of the product in any
specific application. Furthermore, the information herein is not represented as absolutely
complete, since it is not practicable to provide all the scientific and study information in the format
of this document, plus additional information may be necessary under exceptional conditions of
use, or because of applicable laws or government regulations.

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