Butyl nitrite

H225: Highly Flammable liquid and vapor [Danger Flammable liquids]

H301: Toxic if swallowed [Danger Acute toxicity, oral]

H331: Toxic if inhaled [Danger Acute toxicity, inhalation]

P210, P233, P240, P241, P242, P243, P261, P264, P270, P271, P280, P301+P316, P303+P361+P353, P304+P340, P316, P321, P330, P370+P378, P403+P233, P403+P235, P405, and P501 (click each P-code to see the statement)

H225 (100%): Highly Flammable liquid and vapor [Danger Flammable liquids]

H301 (100%): Toxic if swallowed [Danger Acute toxicity, oral]

H331 (100%): Toxic if inhaled [Danger Acute toxicity, inhalation]

Aggregated GHS information provided per 46 reports by companies from 3 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website.

H330: Fatal if inhaled [Danger Acute toxicity, inhalation]

H336: May cause drowsiness or dizziness [Warning Specific target organ toxicity, single exposure; Narcotic effects]

H373: May causes damage to organs through prolonged or repeated exposure [Warning Specific target organ toxicity, repeated exposure]

P210, P233, P240, P241, P242, P243, P260, P261, P264, P270, P271, P280, P284, P301+P316, P303+P361+P353, P304+P340, P316, P319, P320, P321, P330, P370+P378, P403+P233, P403+P235, P405, and P501 (click each P-code to see the statement)

Excerpt from ERG Guide 129 [Flammable Liquids (Water-Miscible / Noxious)]:

Refer to the "General First Aid" section. Specific First Aid: Wash skin with soap and water. In case of burns, immediately cool affected skin for as long as possible with cold water. Do not remove clothing if adhering to skin. (ERG, 2024)

Excerpt from ERG Guide 129 [Flammable Liquids (Water-Miscible / Noxious)]:

CAUTION: The majority of these products have a very low flash point. Use of water spray when fighting fire may be inefficient.

SMALL FIRE: Dry chemical, CO2, water spray or alcohol-resistant foam. Do not use dry chemical extinguishers to control fires involving nitromethane (UN1261) or nitroethane (UN2842).

LARGE FIRE: Water spray, fog or alcohol-resistant foam. Avoid aiming straight or solid streams directly onto the product. If it can be done safely, move undamaged containers away from the area around the fire.

FIRE INVOLVING TANKS, RAIL TANK CARS OR HIGHWAY TANKS: Fight fire from maximum distance or use unmanned master stream devices or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks in direct contact with flames. For massive fire, use unmanned master stream devices or monitor nozzles; if this is impossible, withdraw from area and let fire burn. (ERG, 2024)

Excerpt from ERG Guide 129 [Flammable Liquids (Water-Miscible / Noxious)]:

IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area for at least 50 meters (150 feet) in all directions.

LARGE SPILL: Consider initial downwind evacuation for at least 300 meters (1000 feet).

FIRE: If tank, rail tank car or highway tank is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2024)

Excerpt from ERG Guide 129 [Flammable Liquids (Water-Miscible / Noxious)]:

ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area. All equipment used when handling the product must be grounded. Do not touch or walk through spilled material. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. A vapor-suppressing foam may be used to reduce vapors. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. Use clean, non-sparking tools to collect absorbed material.

LARGE SPILL: Dike far ahead of liquid spill for later disposal. Water spray may reduce vapor, but may not prevent ignition in closed spaces. (ERG, 2024)

Excerpt from ERG Guide 129 [Flammable Liquids (Water-Miscible / Noxious)]:

Wear positive pressure self-contained breathing apparatus (SCBA). Structural firefighters' protective clothing provides thermal protection but only limited chemical protection. (ERG, 2024)

Butyl nitrite appears as a yellow oily liquid with a pleasant odor. A mixture of isomers (n-butyl, sec-butyl and tert-butyl). Slightly soluble in water. Slightly less dense than water. Vapors are much heavier than air. Toxic by ingestion, mildly toxic by inhalation. Used to make fuel for jet airplanes.

Oily liquid; [Merck Index]

81.3 [mmHg]

Nitrogen Compounds -> Nitrates and Nitrites

Flammable agents - 3rd degree

Reactive agents - 3rd degree

Highly flammable. Slightly soluble in water.

Nitro, Nitroso, Nitrate, and Nitrite Compounds, Organic

Highly Flammable

Strong Oxidizing Agent

BUTYL NITRITE is an oxidizing agent but can serve as a reducing agent. May begin a vigorous reaction that culminates in a detonation if mixed with reducing agents, including hydrides, sulfides, nitrides, ammonium salts, cyanides, and many fuels.

Methemoglobinemia - The presence of increased methemoglobin in the blood; the compound is classified as secondary toxic effect

Lacrimator (Lachrymator) - A substance that irritates the eyes and induces the flow of tears.

LC50 (rat) = 420 ppm/4h

Flammable Liquid