The scent of 1-butanethiol is so strong that the human nose can easily detect it in the air at concentrations as low as 10 parts per billion. The threshold level for 1-butanethiol is reported as 1.4 ppb 1 Chemistry 2 Uses Signs of asphyxiation will be noticed when oxygen is reduced to below 16%, and may occur in … unconsciousness. Vapor-phase diacetyl will be degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals; the half-life for this … There are no human or animal studies indicating butane has a potential to be a human carcinogen. Butane has a natural gas or petroleum-like odor. Odor Thresholds for Chemicals with Established Health Standards, 2nd Edition # Compound Name CAS Number Formula Molecular Weight Range of Odor Values (ppm) Odor Character ACGIH TLV® (ppm) OSHA PEL (ppm) AIHA WEEL® (ppm) 27 1,3-Butadiene 106-99-0 C4H6 54.09 0.099 – 76 aromatic, rubber TWA = 2 TWA = 1 STEL = 5 – 28 Butane, all isomers 106-97-8, 75-28-5 C4H10 58.12 Butane MSDS No.

In high concentrations it will displace oxygen from the breathing atmosphere, particularly in confined spaces. Is butane odorous or harmful to plants? Butane also is found in Liquefied Petroleum Gas (LPG) and Natural gas. An odor detection threshold of 1,200 ppm was reported for n-butane. Reasons for Citation f Butane is on the Right to Know Hazardous Substance List because it is cited by ACGIH, DOT, NIOSH, DEP, NFPA and EPA. If released to air, a vapor pressure of 56.8 mm Hg at 25 deg C indicates diacetyl will exist solely as a vapor in the atmosphere.

The odor threshold is defined as the first concen- tration at which all panel members can recognize the odor. Butane has an odor threshold of 2.8500 mg/cu m (low) and 14.6300 mg/ cu m (high). Does butane have an odor?

The effect of chemical purity has been deter- mined by measuring the odor threshold of materials representing different modes of manufacture or after 1807. Butane has not been shown to have an adverse effect on plants. Revision Date: 5/1/2006 Page 2 of 6 This product is a simple asphyxiant. Wiki User 2009-09-25 14:06:12. it smells like "natural gas" according to this text: Odor thresholds for chemicals with established occupational health. An odor detection threshold (ODT) is a biological endpoint that provides a quantitative assessment of the effect of airborne chemicals on the olfactory system of a human subject. standards. f ODOR THRESHOLD=50,000 ppm f Odor thresholds vary greatly. Do not rely on odor alone to determine potentially hazardous exposures.