Crushed Stone

Safety Data: Gabbro

Product Gabbro Crushed Aggregate Products
Synonyms Aggregate, Manufactured Sand, Railroad Ballast, Mineral Filler, Screenings, Rip Rap, Gabbro, Volcanic rock, Igneous Rock
Product Use Aggregate is used in the manufacture of Portland Cement Concrete, Asphalt Paving, and other construction applications.
Manufacturer Dolese Bros. Co.
20 N.W. 13th
Oklahoma City, OK 73101
Phone: 405‐235‐2311
Physical Hazards Not Classified
Hazard Classification 
Carcinogenicity Category 1A
Specific Target Organ Toxicity, Repeated Exposure Category 2
OSHA Defined Hazards Not Classified
Signal Word  Danger
Hazard statement
May cause cancer. May cause damage to organs (lungs) through prolonged or repeated exposure.
Prevention  Obtain special instructions before use. Do not handle until all safety precautions have been read and understood. Wear protective gloves/protective clothing/eye protection/face protection.
If exposed or concerned: Get medical advice/attention.
Storage  Restrict or control access to stockpile areas. Engulfment hazard: To prevent burial or suffocation, do not enter a confined space, such as a silo, bulk truck or other storage container or vessel that stores or contains aggregates without an effective procedure for assuring safety.
Disposal  Dispose of contents/container in accordance with local/regional/national/international regulations.
Hazards not otherwise Classified (HNOC)
None Known
Supplemental Information Respirable Crystalline Silica (RCS) may cause cancer. Gabbro is a naturally occurring mineral complex that contains varying quantities of quartz (crystalline silica). In its natural bulk state, gabbro is not a known health hazard. Gabbro may be subjected to various natural or mechanical forces that produce small particles (dust) which may contain respirable crystalline silica (particles less than 10 micrometers in aerodynamic diameter). Repeated inhalation of respirable crystalline silica (quartz) may cause lung cancer according to IARC and NTP; ACGIH states that it is a suspected cause of cancer. Other forms of RCS (e.g., tridymite and cristobalite) may also be present or formed under certain industrial processes.
Ingredient CAS Number Percent
Gabbro None >99
Quartz 14808-60-7 <1.0
Inhalation Gabbro dust: Move to fresh air. Call a physician if symptoms develop or persist.
Skin contact Gabbro dust: Wash off with soap and water. Get medical attention if irritation develops and persists.
Eye contact Gabbro dust: Immediately flush with plenty of water for at least 15 minutes. Hold eyelids apart. Occasionally lift the eyelid(s) to ensure thorough rinsing. Beyond flushing, do not attempt to remove material from the eye(s). Get medical attention if irritation develops or persists.
Ingestion Gabbro dust: Rinse mouth and drink plenty of water. Never give anything by mouth to an unconscious person. Get medical attention.
Most important symptoms/effects, acute and delayed Inhaling dust may cause discomfort in the chest, shortness of breath, and coughing. Prolonged inhalation may cause chronic health effects. This product contains crystalline silica. Prolonged or repeated inhalation of respirable crystalline silica liberated from this product can cause silicosis and may cause cancer.
Indication of immediate medical attention and special treatment needed Provide general supportive measures and treat symptomatically. Keep victim under observation. Symptoms may be delayed.
General Information Ensure that medical personnel are aware of the material(s) involved, and take precautions to protect themselves. Pre‐existing medical conditions that may be aggravated by exposure include disorders of the eye, skin and lung (including asthma and other breathing disorders). If addicted to tobacco, smoking will impair the ability of the lungs to clear themselves of dust.
Suitable extinguishing media Non‐flammable. Use fire‐extinguishing media appropriate for surrounding materials
Unsuitable extinguishing media None known
Specific hazards arising from the chemical No unusual fire or explosion hazards noted. Not a combustible dust.
Special protective equipment and precautions for firefighters Use protective equipment appropriate for surrounding materials.
Firefighting equipment/instructions No Specific precautions.
Specific methods Contact with powerful oxidizing agents may cause fire and/or explosions (see section 10 of SDS)
General fire hazards No unusual fire or explosion hazards noted.
Personal precautions and emergency procedures Wear appropriate protective equipment and clothing during clean-up of materials that contain or may liberate gabbro dust
Materials and methods for containment and clean-up Spilled material, where dust is generated, may overexpose cleanup personnel to respirable crystalline silica-containing dust. Do not dry sweep or use compressed air for clean-up. Wetting of spilled material and/or use of respiratory protective equipment may be necessary.
Environmental Precautions Do not wash aggregates down sewage and/or drainage systems or into bodies of water (e.g. streams).
Precautions for safe handling Do not handle until all safety precautions have been read and understood. Keep formation of airborne dusts to a minimum. Provide appropriate exhaust ventilation at places where dust is formed. Do not breathe dust. Avoid prolonged exposure. Provide adequate ventilation. Wear appropriate personal protective equipment. Observe good industrial hygiene practices.
Conditions for safe storage Avoid dust formation or accumulation.
Occupational exposure limits
  1. Value equivalent to OSHA formulas (29 CFR 1910.1000; 29 CFR 1917; 29 CFR 1918).
  2. Value also applies to MSHA Metal/Non‐Metal (1973 TLVs at 30 CFR 56/57.5001)
  3. OSHA enforces 0.250 mg/m³ in construction and shipyards (CPL‐03‐00‐007).
  4. Value also applies to OSHA construction (29 CFR 1926.55 Appendix A) and shipyards (29 CFR 1915.1000 Table Z).
  5. MSHA limit = 10 mg/m³
U.S. OSHA Table Z‐1 Limits for Air Contaminants (29 CFR 1910.1000) 
Components Types Value Form
Particulates not otherwise classified (CAS SEQ250) PEL 5 mg/m³
15 mg/m³
Respirable fraction
Total dust (4) 
U.S. OSHA Table Z‐3 (29 CFR 1910.1000)
Components Types Value Form
Crystalline Silica (Quartz) (CAS 14808‐60‐7) TWA 0.3 mg/m³
0.1 mg/m³
Total dust (1,2)
Respirable (1,2,3)
Tridymite and Cristobalite (other forms of crystalline silica) (CAS Mixture) TWA 0.15 mg/m³
0.05 mg/m³
Total dust (1)
Respirable (1,2)
Particulates not otherwise classified (CAS SEQ250) TWA 5 mg/m³
15 mg/m³
Respirable fraction (1)
Total dust (1,4,5)
U.S. ACGIH Threshold Limit Values®
Components Type Value Form
Crystalline Silica (all forms; CAS mixture) TWA 0.025 mg/m³ Respirable fraction
Particulates not otherwise classified (CAS Mixture) TWA 3 mg/m³
10 mg/m³
Respirable particles (2)
Inhalable particles (2)
U.S. NIOSH: Pocket Guide to Chemical Hazards Components
Components Type Value Form
Crystalline Silica (all forms; CAS mixture) TWA 0.05 mg/m³ Respirable dust
Biological limit values No biological exposure limits noted for the ingredient(s).
Exposure guidelines OSHA PELs, MSHA PELs, and ACGIH TLVs are 8-hr TWA values. NIOSH RELs are for TWA exposures up to 10- hr./day and 40-hr/wk. Occupational exposure to nuisance dust (total and respirable) and respirable crystalline silica should be monitored and controlled. Terms including "Particulates Not Otherwise Classified," "Particulates Not Otherwise Regulated," "Particulates Not Otherwise Specified," and "Inert or Nuisance Dust" are often used interchangeably; however, the user should review each agency's terminology for differences in meanings.
Appropriate engineering controls Good general ventilation (typically 10 air changes per hour indoors) should be used. Ventilation rates should be matched to conditions. If applicable, use process enclosures, local exhaust ventilation, or other engineering controls to maintain airborne levels below recommended exposure limits. If exposure limits have not been established, maintain airborne levels to an acceptable level.
Eye/face protection Wear safety glasses with side shields (or goggles).
Hand/Skin Protection  Use personal protective equipment as required.
Respiratory protection When handling or performing work with Limestone that produces dust or respirable crystalline silica in excess of applicable exposure limits, wear a NIOSH‐approved respirator that is properly fitted and is in good condition. Respirators must be used in accordance with all applicable workplace regulations.
Thermal hazards Not anticipated. Wear appropriate thermal protective clothing, when necessary.
General hygiene considerations Always observe good personal hygiene measures, such as washing after handling the material and before eating, drinking, and/or smoking. Routinely wash work clothing and protective equipment to remove contaminants.
Physical state Solid   Vapor Pressure Not applicable
Form Solid particles   Vapor Density  Not applicable
Color Black to grey   Relative Density  2.78 - 2.82 
Odor Not applicable   Solubility (water)  Insoluble 
Odor threshold Not applicable   Partition coefficient  Not applicable
pH 8.5 - 9.0   Auto-ignition temperature  Not applicable 
Melting point/freezing point Not applicable   Decomposition temperature  Not applicable 
Initial boiling point and boiling range Not applicable   Viscosity  Not applicable 
Flash point Non combustible   Flammability  Not applicable 
Evaporation rate Not applicable      
Flammability limit - lower (%) Not applicable      
Flammability limit - Upper (%) Not applicable      
Reactivity The product is stable and non‐reactive under normal conditions of use, storage and transport.
Chemical stability Material is stable under normal conditions.
Possibility of hazardous reactions No dangerous reaction known under conditions of normal use.
Information on likely routes of exposure
Inhalation Repeated inhalation of respirable crystalline silica (quartz) may cause silicosis, a fibrosis (scarring) of the lungs. Silicosis is irreversible and may be fatal. Silicosis increases the risk of contracting pulmonary tuberculosis. Some studies suggest that repeated inhalation of respirable crystalline silica may cause other adverse health effects including lung and kidney cancer.
Skin contact Gabbro dust: May cause irritation through mechanical abrasion.
Eye contact Gabbro dust: May cause irritation through mechanical abrasion.
Ingestion Not likely, due to the form of the product. However, accidental ingestion of the content may cause discomfort.
Symptoms related to the physical, chemical and toxicological characteristics Gabbro dust: Discomfort in the chest. Shortness of breath. Coughing.
Information on toxicological effects
Acute toxicity Not expected to be acutely toxic.
Skin corrosion/irritation This product is not expected to be a skin hazard.
Serious eye damage/eye irritation Direct contact with eyes may cause temporary irritation.
Respiratory or skin sensitization
Respiratory sensitization No respiratory sensitizing affects known.
Skin sensitization Not known to be a dermal irritant or sensitizer.
Germ cell mutagenicity No data available to indicate product or any components present at greater than 0.1% are mutagenic or genotoxic.
Carcinogenicity Respirable crystalline silica has been classified by IARC and NTP as a known human carcinogen, and classified by ACGIH as a suspected human carcinogen.
IARC Monographs. Overall Evaluation of Carcinogenicity
Crystalline Silica (Quartz) (CAS 14808‐60‐7) 1 Carcinogenic to humans.
Respirable Tridymite and Cristobalite (other forms of Crystalline) (CAS Mixture)
1 Carcinogenic to humans.
NTP Report on Carcinogens Crystalline Silica (Quartz) (CAS 14808‐60‐7) Known To Be Human Carcinogen.
OSHA Specifically Regulated Substances (29 CFR 1910.1001‐1050) Not listed.
Reproductive toxicity Not expected to be a reproductive hazard.
Specific target organ toxicity ‐ single exposure Not classified.
Specific target organ toxicity -repeated exposure  Respirable crystalline silica: May cause damage to organs (lung) through prolonged or repeated exposure.
Aspiration hazard Due to the physical form of the product it is not an aspiration hazard.
Chronic effects Prolonged inhalation of respirable crystalline silica may be harmful. May cause damage to organs (lungs) through prolonged or repeated exposure. There are reports in the literature suggesting that excessive crystalline silica exposure may be associated with autoimmune disorders and other adverse health effects involving the kidney. In particular, the incidence of scleroderma (thickening of the skin caused by swelling and thickening of fibrous tissue) appears to be higher in silicotic individuals. To date, the evidence does not conclusively determine a causal relationship between silica exposure and these adverse health effects.
Ecotoxicity Not expected to be harmful to aquatic organisms. Discharging Limestone dust and fines into waters may increase total suspended particulate (TSP) levels that can be harmful to certain aquatic organisms.
Persistence and degradability Not applicable.
Bioaccumulative potential Not applicable.
Mobility in soil Not applicable.
Other adverse effects No other adverse environmental effects (e.g., ozone depletion, photochemical ozone creation potential, global warming potential) are expected from this component.
Disposal instructions Do not allow fine particulate matter to drain into sewers/water supplies. Do not contaminate ponds, waterways or ditches with fine particulates. Dispose of contents in accordance with local/regional/national/international regulations.
Hazardous waste code Not regulated.
Waste from residues / unused products Dispose of in accordance with local regulations. Empty containers or liners may retain some product residues. This material and its container must be disposed of in a safe manner (see: Disposal instructions).
Contaminated packaging Since emptied containers may retain product residue, follow label warnings even after container is emptied. Empty packaging materials should be recycled or disposed of in accordance with applicable regulations and practices.

This product is not classified as a Hazardous Material under U.S. DOT regulations.

US federal regulations This product is a "Hazardous Chemical" as defined by the OSHA Hazard Communication Standard, 29 CFR 1910.1200.
TSCA Section 12(b) Export Notification (40 CFR 707, Subpt. D) Not regulated.
OSHA Specifically Regulated Substances (29 CFR 1910.1001‐1050) Not listed.
CERCLA Hazardous Substance List (40 CFR 302.4) Not listed.
Superfund Amendments and Reauthorization Act of 1986 (SARA)
SARA 302 Extremely hazardous substance Not listed
SARA 311/312 Hazardous chemical Yes
SARA 313 (TRI reporting) Not regulated
Hazard categories
Immediate Hazard No
Delayed Hazard Yes
Fire Hazard No
Pressure Hazard No
Reactivity Hazard No
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) Not regulated
Safe Drinking Water Act (SDWA) Not regulated
International Inventories
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).

Dolese Bros. Co. (DBC) believes the information contained herein is accurate; however, DBC makes no guarantees with respect to such accuracy and assumes no liability in connection with the use of the information contained herein which is not intended to be and should not be construed as legal advice or as insuring compliance with any federal, state or local laws or regulations. Any party using this product should review all such laws, rules, or regulations prior to use, including but not limited to the United States and Local State regulations.


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