Material Safety Data Sheet GesscoTM 150* Page 1 of 6
HMIS HEALTH 2
HMIS FLAMMABILITY 0
HMIS REACTIVITY 0
PERSONAL PROTECTION H
Section 1: Product and Company Identification
Product Name: GesscoTM 150*
Gulf Engineering Co. LLC
611 Hill Street Generic Name: Catalyzed sodium sulfite
Jefferson, LA 70121 Synonyms: NA
Business: (800) 347-4749 Product Description: Boiler water oxygen scavenger
Technical: (504) 602-1824 CAS # NA ?blend
Date of Revision: 6/06/2006
The fourth digit of the product number designates the container size:
GesscoTM 150-4 -100 lbs in a 10.5 gallon fiber drum
GesscoTM 150-5 - 300 lbs in a 32 gallon fiber drum
24-Hour Emergency Phone Number: (800) 424-9300 (CHEMTREC)
Section 2: Hazard Identification
Emergency Overview: Appearance: White granular solid with red specks. Flash Point: Not flammable. Warning!
Harmful if swallowed or inhaled. Causes irritation to skin, eyes and respiratory tract. May cause allergic respiratory
reaction. Reacts with acids and water releasing toxic sulfur dioxide gas.
OSHA Regulatory Status: This material is considered hazardous under the OSHA standard.
Potential Health Effects:
Inhalation: Inhalation of dust may cause irritation to the mucous membranes of the upper respiratory tract. Use of
bronchodilators preserved with sulfites can cause allergic reactions.
Ingestion: May cause gastric irritation by the liberation of sulfurous acid. Large doses may result in circulatory
disturbances, diarrhea, and central nervous system depression. Estimated fatal dose is 0.5 to > 5g/kg.
Skin Contact: May cause irritation.
Eye Contact: May cause irritation, redness and pain.
Chronic Exposure: Cobalt compounds may cause cancer based upon animal studies.
Aggravation of Pre-existing Conditions: Some individuals are said to be dangerously sensitive to minute amounts
of sulfites in foods and some bronchodilator medicines preserved with sulfites. Symptoms may include broncho
constriction, shock, gastrointestinal disturbances, angio edema, flushing, and tingling sensations.
Target Organs: Central nervous system.
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Material Safety Data Sheet GesscoTM 150* Page 2 of 6
Section 3: Composition / Information On Ingredients
Component CAS # Weight % OSHA PEL ACGIH TLV
Sodium sulfite 7757-83-7 > 95 None None
5 mg/m3
Sodium metabisulfite 7681-57-4 <5 None
0.1 mg/m3 0.02 mg/m3
Cobalt sulfate 10026-24-1 (heptahydrate) 0.1 ?0.5
10124-43-3 (Anhydrous)
Non-hazardous components may or may not be listed. Carcinogens are listed when present at 0.1% or more; components
which are otherwise hazardous according to OSHA are listed when present at 1.0% or more. This is not intended to be
complete compositional disclosure. See Section 15 for applicable states right to know and other regulatory information.
Section 4: First Aid Measures
Inhalation: Remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
Get medical attention immediately.
Ingestion: Induce vomiting immediately as directed by medical personnel. Never give anything by mouth to an
unconscious person. Get medical attention.
Skin: Immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and
shoes. Get medical attention immediately. Wash clothing before reuse. Thoroughly clean shoes before reuse.
Eyes: Immediately flush eyes with plenty of water for at least 15 minutes, lifting lower and upper eyelids
occasionally. Get medical attention immediately.
Note to Physicians: Treat symptomatically and supportively.
Section 5: Fire Fighting Measures
Fire: Aqueous solution, not considered to be a fire hazard.
Explosion: Not considered to be an explosion hazard.
Extinguishing Media: Use any means suitable for extinguishing surrounding fire.
Special Precautions: In the event of a fire, wear full protective clothing and NIOSH-approved self-contained
breathing apparatus with full facepiece operated in the pressure demand or other positive pressure mode.
NFPA Rating: Health - 2 Flammability - 0 Reactivity - 0 Other - NA
Section 6: Accidental Release Measures
Ventilate area of leak or spill. Remove all sources of ignition. Wear appropriate personal protective equipment as
specified in Section 8. Isolate hazard area. Keep unnecessary and unprotected personnel from entering. Contain and
recover liquid when possible. Use non-sparking tools and equipment. Collect liquid in an appropriate container or
absorb with an inert material (e. g., vermiculite, dry sand, earth), and place in a chemical waste container.
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Material Safety Data Sheet GesscoTM 150* Page 3 of 6
Section 7: Handling and Storage
Protect container against physical damage. Store in a cool, dry well-ventilated location, away from any area where
the fire hazard may be acute. Outside or detached storage is preferred. Separate from incompatibles. Containers of
this material may be hazardous when empty since they retain product residues (vapors, liquid); observe all warnings
and precautions listed for the product. Do not attempt to clean empty containers since residue is difficult to remove.
Section 8: Exposure Control / Personal Protection
Exposure Guidelines: CAS# 7757-83-7 OSHA PEL: None ACGIH TLV: None
ACGIH TLV: 5 mg/m3
CAS# 7681-57-4 OSHA PEL: None
3
ACGIH TLV: 0.02 mg/m3
CAS# 10124-43-3 OSHA PEL: 0.1 mg/m
Cobalt sulfate (CAS# 10124-43-3, Anhydrous and CAS# 10026-24-1, heptahydrate) is categorized by ACGIH as
A3: Animal carcinogen.
OSHA guidelines limit dust exposure to respirable dust to 5 mg/m3 and to total dust to 15 mg/m3
ACGIH guidelines limit exposure to total dust to 15 mg/m3
Personal Protective Equipment:
Skin Contact: Wear impervious protective clothing, including boots, gloves, lab coat, apron or coveralls, as
appropriate, to prevent skin contact.
Eye Contact: Use chemical safety goggles and/or a full face shield where splashing is possible. Maintain eye wash
fountain and quick-drench facilities in work area.
Inhalation: Use NIOSH approved vapor respirator if exposure is unknown or exceeds permissible limits. A
respiratory protection program that meets OSHA's 29 CFR 1910.134 or ANSI Z88.2 requirements must be followed
whenever workplace conditions warrant respirator use. WARNING: Air-purifying respirators do not protect workers
in oxygen-deficient atmospheres.
Engineering Controls: A system of local and/or general exhaust is recommended to keep employee exposures
below the Airborne Exposure Limits. Local exhaust ventilation is generally preferred because it can control the
emissions of the contaminant at its source, preventing dispersion of it into the general work area. Please refer to the
ACGIH document, Industrial Ventilation, A Manual of Recommended Practices, most recent edition, for details.
Section 9: Physical and Chemical Properties
2.6 (162 lbs/ft3)
Appearance White-pink granular solid Specific Gravity (g/mL)
Odor Mild sulfurous pH (1% solution) 8.0 ?9.0
Odor Threshold ND Solubility in water Complete
Melting Point Decomposes % Volatiles ND
Boiling Point NA Evaporation Rate ND
Flash Point Not flammable Vapor Pressure ND
Lower Explosive Limit NA Vapor Density (air = 1.0) ND
Upper Explosive Limit NA Viscosity ND
Auto-Ignition Temperature ND log (Part. Coeff oct-H2O) ND
Decomposition Temp ND
Section 10: Stability and Reactivity
Chemical Stability: Stable under ordinary conditions of use and storage
Hazardous Decomposition Products: May form sulfur oxides when heated to decomposition
Hazardous Polymerization: Will not occur
Incompatibilities: Strong acids
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Material Safety Data Sheet GesscoTM 150* Page 4 of 6
Conditions to Avoid: Heat, flames and incompatibles
Section 11: Toxicological Information
Acute Dose Effects: Sodium sulfite: Oral, mouse: LD50 = 820 mg/kg
Sodium metabisulfite: Skin, rat: LD50 = >2 gm/kg; Oral, rat: LD50 = >2 gm/kg
Cobalt sulfate: Oral rat LD50: 424 mg/kg
Section 12: Ecological Information
Environmental Fate: No information found.
Ecotoxicity: Sodium sulfite: Fish Toxicity: LC50 (96 hr) fathead minnow GT100 mg/l Water flea: 32 mg/L
Section 13: Disposal Considerations
As a waste, this product as sold IS NOT considered a HAZARDOUS WASTE under RCRA (29 CFR 261).
Whatever cannot be saved for recovery or recycling should be managed in an appropriate and approved waste
disposal facility. Processing, use or contamination of this product may change the waste management options. State
and local disposal regulations may differ from federal disposal regulations. Dispose of container and unused
contents in accordance with federal, state and local requirements.
Section 14: Transport Information
Proper Shipping Name: Not regulated.
DOT Hazard Class: NA
UN Number: NA
Packing Group: NA
Label: NA
CERCLA Reportable Quantity (RQ): CAS# 10124-43-3, cobalt sulfate, RQ = 1 lb, about 400 lbs of product.
Releases exceeding the reportable quantity (RQ) must be reported to the National Response Center (800) 424-8802.
This data provided for information only. The description shown may not apply to all shipping situations.
Consult 49 CFR, or appropriate regulations to properly classify your shipment for transportation.
Section 15: Regulatory Information
TSCA Sec 8(b) Chemical Inventory: All of the chemicals in this product are listed on the TSCA Inventory.
TSCA Sec 4 Chemical Test Rule: None of the chemicals in this product are under a Chemical Test Rule.
TSCA Sec 8(d): None of the chemicals in this product are on the Health and Safety Reporting List.
TSCA Sec 12(b) Notices of Export: None of the chemicals in this product are on this list.
TSCA Significant New Use Rule (SNUR): None of the chemicals in this product are on this list.
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Material Safety Data Sheet GesscoTM 150* Page 5 of 6
SARA Sec 302 (EHS) TPQ: None of the chemicals in this product have a TPQ.
SARA Sec 304 (EHS) RQ: None of the chemicals in this product have a RQ.
SARA Sec 311/312: Acute ?CAS #7757-83-7, 10124-43-3 and 7681-57-4; Chronic ?CAS# 10124-43-3; Fire ?br>
NO; Release of Pressure ?NO; Reactivity ?CAS# 7681-57-4
SARA 313 List: Cobalt sulfate is reportable under Section 313 Title III and 40 CFR Part 372
CERCLA Hazardous Substances and corresponding RQs: CAS# 10124-43-3, RQ = 1 lb, about 400 lbs of
product.
RCRA: None of the chemicals in this product are on this list.
Clean Air Act: Hazardous Air Pollutants? CAS# 10124-43-3 Class 1 Ozone Depletors? NO Class 2 Ozone
Depletors? NO
Clean Water Act: Hazard Substance? NO Priority Pollutant? NO Toxic Pollutant? NO
Chemical Weapons Convention: None of the chemicals in this product are on this list.
Drug Enforcement Agency (DEA) CDTA: None of the chemicals in this product are on this list.
OSHA: None of the chemicals in this product are considered Highly Hazardous by OSHA.
FDA: Federal Food, Drug and Cosmetic Act: When use situations necessitate compliance with FDA regulations, this
product is acceptable under 21 CFR 173.310 Boiler Water Additives where the steam may contact food.
State Right-to-Know Lists: Sodium metabisulfite is found on the Right-to-Know lists of California, New Jersey,
Florida, Pennsylvania, Minnesota and Massachusetts.
California Proposition 65: WARNING: This product contains Cobalt sulfate heptahydrate, or Cobalt sulfate
anhydrous, a chemical known to the state of California to cause cancer.
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Material Safety Data Sheet GesscoTM 150* Page 6 of 6
Section 16: Other Information
Abbreviations and acronyms used:
ACGIH American Congress of Governmental Industrial Hygienists NA not applicable, not available
ANSI American National Standards Institute NIOSH National Institute for Occupational Safety and Health
atm atmosphere (pressure unit) ND not determined
BOD biological oxygen demand NFPA National Fire Prevention Association
CAS Chemical Abstracts Service NTP National Toxicology Program
CC closed cup OC open cup
CDTA Chemical Drug and Trafficking Act OSHA Occupational Safety and Health Administration
COC Cleveland Open Cup Part partition
COD chemical oxygen demand PEL permissible exposure limits
coeff. coefficient ppb parts per billion
CFR Code of Federal Regulations PPE personal protective equipment
CPR cardio-pulmonary resuscitation ppm parts per million
DEA Drug Enforcement Agency psi pounds per square inch
DOT Department of Transportation RCRA Resource Conservation and Recovery Act
FDA Food and Drug Administration RQ Reportable quantity
IARC Internat'l Agency for Research on Cancer RTK Right to Know
IDLH immediate danger to life and health SARA Superfund Amendments and Reauthorization Act
kg kilogram STEL short-term exposure limit
L liter TCC Tagliabue Closed Cup
LC50 median lethal concentration TPQ threshold planning quantity
LD50 median lethal dose TQ threshold quantity
LEL lower explosive limit TSCA Toxic Substances Control Act
mg milligram TWA time-weighted average
mL milliliter UEL upper explosive limit
This document was prepared in accordance with 29 CFR 1910.1200 and ANSI Z400.1-2005.
Prepared by Douglas R. Chrisope on June 6, 2006.
REVISION STATEMENT: Changes have been made throughout this Material Safety Data Sheet. Please read the
entire document.
DISCLAIMER: Although the information and recommendations set forth herein (hereinafter
"Information") are presented in good faith and believed to be correct as of the date hereof, the Company
makes no representations as to the completeness or accuracy thereof. Information is supplied upon the
condition that the persons receiving this MSDS will make their own determination as to its suitability for
their intended purposes prior to use. Since the product is within the exclusive control of the user, it is the
user's obligation to determine the conditions of safe use of this product. Such conditions should comply with
all Federal Regulations concerning the Product. It must be recognized that the physical and chemical
properties of any product may not be fully understood and that new, possibly hazardous products may arise
from reactions between chemicals. The information given in this data sheet is based on our present
knowledge and shall not constitute a guarantee for any specific product features and shall not establish a
legally valid contractual relationship. NO REPRESENTATIONS OR WARRANTIES, EITHER EXPRESS
OR IMPLIED, OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR OF ANY
OTHER NATURE ARE MADE HEREUNDER WITH RESPECT TO INFORMATION OR THE
PRODUCT TO WHICH INFORMATION REFERS.
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