Section 1: Product Information

	Trade Name:	Unhardened portland cement concrete (Note: Also see MSDS on hardened concrete.)
	Producer's Name:	Graniterock Company
	Address:	411 Walker Street PO Box 50001 Watsonville, CA 95077-5001
	Phone Number:	831.768.2000
	Date Prepared:	October, 1999
	Prepared by:	Paul C. Lessard

Section 2: Hazardous Ingredients

Chemical Names

CAS Number

Quantity (Percent)

Formula

Exposure Limits in Air

ACGIH TLV1

OSHA PEL2

Crystalline silica (aggregate)

14808-60-7

approx. 103

SiO2

0.1 mg/m³

10 mg/m³ %SiO2+2

Magnesium oxide (cement)

1309-48-4

< 5 4

MgO

10 mg/m³

15 mg/m³

Calcium oxide (cement)

1305-78-8

< 10 4

CaO

2 mg/m³

5 mg/m³

1 ACGIH TLV: American Conference of Industrial Hygienist Threshold Limit Value (TLV) time-weighted average (TWA) 2 OSHA PEL: Occupational Safety and Health Association Permissible Exposure Limit for an 8-hour time weighted average 3 Assumes concrete mix is composed of approximately 75% granite aggregate which contain approximately 12% silica as measured by DCM Science Labs, Wheat Ridge, Colorado. 4 Assumes concrete mix is composed of 15% portland cement paste.

Section 3: Hazard Identification

Overview: This product contains portland cement, water, and aggregates (sand and gravel). The naturally occurring aggregate, typically granite and/or limestone, contains varying amounts of crystalline silica as described herein. When working with this alkaline product, wear protective rubber gloves. This product may also contain small quantities of admixtures from secondary producers including: Daravair M/R, WRDA with Hycol, Eclipse, Daratard 17, Daracem 19, Polarset, ADVA, DCI Corrosion Inhibitor (from W.R. Grace), fly ash (from Pozzolanic International), and/or calcium chloride (from Hillbrothers Chemical Co.) as well as colors and fibermesh. For information on these products, consult with Graniterock or the manufacturer. When in the hardened state, portland cement concrete may yield dust containing crystalline silica when drilled, cut, sawed, or abraded in any way. Please see the "Hardened Concrete" Graniterock MSDS for additional information.

Potential Health Effects

	Eye contact:	If wet concrete contacts eyes, rinse immediately with water. If irritation persists, contact a physician.
	Skin contact:	Wet concrete is very alkaline and will burn and/or dry skin severely. Wear rubber gloves when handling.
	Ingestion:	Not applicable.
	Chronic:	Not applicable.
	Ingestion:	Not applicable.

Section 4: First Aid Measures

	Eye contact:	Gently flush eyes with clean water. Seek medical aid if irritation persists or develops.
	Skin contact:	Wash with soap and water. Seek medical aid if irritation persists or develops.
	Inhalation:	N/A
	Chronic:	N/A

Section 5: Fire And Explosion
Will not burn or explode under any conditions. Non-flammable and non-explosive.

Section 6: Accidental Release Measures
Spill Response Procedures: Keep concrete and concrete rinse water away from streams, lakes, and storm drains by placing earthen beams across runoff pathway. Wait until concrete is sufficiently hardened to handle.

Preparing Waste for Disposal: No special procedures required. Dispose of according to local, state and federal regulations. Not classified as a hazardous waste by the Resource Conservation and Recovery Act.

Section 7: Exposure Controls/Personal Protection
Respiratory Protection: Not required when unhardened. However, protection is required when hardened. See Graniterock’s Hardened Concrete MSDS for additional information.

Gloves: Water proof gloves should be used.

Other Clothing: No special requirements.

Work Practices: Avoid contact with skin.

Hygiene Practices: Wash dust-exposed skin with soap and water.

Section 8: Physical Properties

Vapor density (air=1): None
Melting point: N/A
Specific gravity: 2.2–2.5
Boiling point: N/A
Solubility in water: Insoluble
Evaporation rate: None
Vapor pressure: None
Appearance and odor: Grey mixture containing aggregates and cement paste.

Graniterock Company Disclaimer
The information contained in this MSDS is based on tests, experience and other information which Graniterock Company believes reliable and is supplied for informational purposes only. Since conditions of use are outside of our control, Graniterock Company disclaims any liability for damage or injury which results from use of the above information. Nothing contained herein shall constitute a guarantee, warranty (including warranty of merchantability) or representation (including freedom from patent liability) by Graniterock Company with respect to the information, the material described, or its use for any specific purpose, even if that purpose is known to Graniterock Company.