Safety Data Sheet

1. Identification

Product identifier: NASCRETE Fresh Mixed Concrete

Other names: Volumetric fresh concrete, Concrete, Ready Mix Concrete, Portland Cement Concrete, Ready Mix Grout, Permeable Concrete, Shotcrete, Gunite, Colored Concrete, Flowable Fill, Roller-Compacted Concrete, Fiber Reinforced Concrete, Mud.

Identified uses: Fresh concrete supplied from volumetric mixers for use as a structural component in residential, commercial and civil construction.

Supplier: NASCRETE, 8747 Weems Rd, Manassas, VA 20110. Phone: (571) 602-4757. Website: www.nascrete.com

Emergency telephone: (804) 549-3498 | Poison Help (US): 1-800-222-1222

2. Hazards Identification

Hazards apply primarily to wet, freshly mixed concrete during handling and placement, and to dust generated from hardened concrete when cutting, grinding or drilling.

Classification of mixture (GHS):

• Skin Corrosion/Irritation: Category 1
• Serious Eye Damage/Irritation: Category 1
• Sensitization – Skin: Category 1
• Specific Target Organ Toxicity (Single Exposure – respiratory tract): Category 3
• Specific Target Organ Toxicity (Repeated Exposure – lungs): Category 2
• Carcinogenicity (inhalation of respirable crystalline silica): Category 1A

Hazard statements:

• Causes severe skin burns and serious eye damage.
• May cause an allergic skin reaction.
• May cause respiratory irritation.
• May cause cancer by inhalation (respirable crystalline silica).
• May cause damage to organs (lung/respiratory system) through prolonged or repeated exposure (inhalation).

Response:

• IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower.
• IF IN EYES: Rinse cautiously with water for several minutes. Get immediate medical attention.
• IF INHALED: Remove person to fresh air and keep comfortable for breathing.
• IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. Get immediate medical attention.

3. Composition / Information on Ingredients

Mixture (Portland cement, coarse aggregate, fine aggregate, water, admixtures).

May contain trace (< 0.05%) amounts of chromium (including hexavalent chromium), nickel, lead, mercury and other naturally occurring metals.

4. First-aid Measures

Inhalation: Remove to fresh air. Get medical attention if irritation persists.

Skin contact: Wash with plenty of cool water and pH-neutral soap. Seek medical attention for rash, burns or dermatitis.

Eye contact: Immediately flush eyes with plenty of water for at least 20 minutes. Get immediate medical attention. Treat as chemical burns.

Ingestion: Rinse mouth with water. Do not induce vomiting unless directed by medical personnel.

Most important symptoms: Severe skin and eye burns, possible blindness, respiratory irritation. Long-term inhalation of respirable crystalline silica can cause silicosis and increase the risk of lung cancer.

5. Fire-fighting Measures

Use extinguishing media suitable for surrounding fire. No specific fire or explosion hazard. Wear appropriate protective equipment as needed.

6. Accidental Release Measures

Avoid contact with eyes and skin. Wet, unhardened concrete should be recycled or allowed to harden before disposal. Do not wash concrete into sewers, drainage systems or natural water bodies.

7. Handling and Storage

Use appropriate PPE. Avoid contact with eyes, skin and clothing. Do not allow wet concrete inside boots, shoes or gloves. Components react with water to form calcium hydroxide, a strong alkali that can cause severe burns.

8. Exposure Controls / Personal Protection

• Portland cement (total dust): OSHA PEL 15 mg/m³; respirable 5 mg/m³.
• Respirable crystalline silica (quartz): OSHA/MSHA PEL 50 µg/m³; ACGIH TLV 0.025 mg/m³.
• Eye/face: Safety glasses with side shields or goggles; face shield where splashing is likely.
• Skin: Impervious, waterproof, alkali-resistant gloves; long sleeves; high waterproof boots.
• Respiratory: Approved particulate respirator when dust may exceed limits.

9. Physical and Chemical Properties

Appearance: solid, semi-fluid, typically gray. Odorless. pH (pore solution) ~12+ (strongly alkaline). Relative density 1.7–3.0. Not flammable.

10. Stability and Reactivity

Cementitious materials react slowly with water, forming hydrated compounds and producing strongly alkaline solutions. Stable under normal conditions. Avoid strong acids and powerful oxidizing agents.

11. Toxicological Information

Likely routes: dermal contact, eye contact, inhalation, ingestion. Chronic effects include silicosis and increased lung cancer risk from long-term inhalation of respirable crystalline silica. Respirable crystalline silica is IARC Group 1 / NTP known human carcinogen.

12. Ecological Information

Fresh unhardened concrete can raise pH if it enters water, which may be harmful to aquatic life. Hardened concrete is considered inert.

13. Disposal Considerations

Dispose of in accordance with local, regional and national regulations. Recycle or allow to harden where possible. Do not discharge process water to sewers unless compliant with applicable requirements.

14. Transport Information

UN number: Not regulated. Ensure persons transporting product know what to do in the event of an accident or spillage.

15. Regulatory Information

Considered a hazardous material under OSHA Hazard Communication. California Proposition 65: respirable crystalline silica, hexavalent chromium, nickel compounds and other trace metals are known to the State of California to cause cancer and/or reproductive harm.

16. Other Information

Revision date: February 2026 · Version: NASCRETE SDS – Ready Mixed Concrete

This Safety Data Sheet is based on currently available information and is intended to describe the product in terms of health, safety and environmental requirements. It should not be construed as guaranteeing specific properties.