Marking Chalk Yellow

SECTION 2: Hazards identification

Product definition

These products are colored finely powdered odorless chalks.

Health hazards

Inhalation of dusts from this product may irritate the respiratory system. Skin and eye contact may cause mechanical abrasion. These chalks contain Crystalline Silica, a known human carcinogen by inhalation. Flammability Hazards: These chalks are not flammable. Finely divided dusts from these products can form explosive mixtures in air. If involved in a fire, these products may decompose to form iron oxides, aluminum oxides, silicon dioxide, sulfur dioxide, magnesium oxides, carbon oxides and calcium oxides.

Potential health effects

EYES: May cause irritation. Chalk dust is discomforting and abrasive to the eyes. SKIN: Prolonged contact may cause irritation. When the product is used as intended, it is unlikely to cause problems. INGESTION: Ingestion of large amount may cause internal irritation. Ingestion is considered an unlikely route of entry in commercial or industrial environments. INHALATION: May irritate the respiratory system. When the product is used as intended, it is unlikely to cause problems. Chronic: Repeated or prolonged inhalation exposure to crystalline silica dust beyond exposure limits may cause chronic lung injury (silicosis). Prolonged inhalation of iron oxide dust is known to produce a benign lung condition known as siderosis. When the product is used as intended, dust levels should not exceed exposure limits. See Sections 8 and 11.

Hazard statements

Hazardous Material Identification System (HMIS): Health 1*, Flammability 0, Reactivity 0

Potential chronic health

DANGER National Fire Protection Association (NFPA): Health 1, Flammability 0, Reactivity 0 Obtain special instructions before use. May cause cancer by inhalation. Avoid breathing dust or fume. Causes serious eye irritation. Causes mild skin irritation. Do not handle until all safety precautions have been read and understood. Wear protective gloves and eye protection.