The liquid is then displaced back into the base of the bird by the warm DCM vapour rising, thus returning the bird to its original position and the pressure back to equilibrium. Dichloromethane plays an important part in the mechanism; its low boiling point means the drinking bird can function at room temperature.
Some people believe that the toy is a perpetual motion machine; however this is unfortunately not true, as it uses temperature gradients as an energy source. Science writer Emily James there with the odour-filled chemistry of dichloromethane. Next week, we switch senses from smell to sight and things begin to glow. Of all the potential properties of a chemical substance, probably the most exotic is being able to glow in the dark.
Amongst the fictional forensic equipment shown on television, Brian Clegg notices one distinctly non-fiction stalwart: luminol.
A DNA researcher tells the story of how humans have shaped the evolution of living things on Earth. Site powered by Webvision Cloud. Skip to main content Skip to navigation. Related audio. Book club — Deep Sniff by Adam Zmith. Meera Senthilingam This week, Emily James sniffs out her favourite solvent. Emily James. Latest audio. Book club — Lessons from Plants by Beronda Montgomery.
Book club — Vampirology by Kathryn Harkup. Load more audio. Related articles. Podcast Luminol TZ Amongst the fictional forensic equipment shown on television, Brian Clegg notices one distinctly non-fiction stalwart: luminol.
Load more articles. No comments yet. You're not signed in. Personal protection: self-contained breathing apparatus. Collect leaking liquid in sealable containers.
Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. Separated from food and feedstuffs and incompatible materials. Well closed. Ventilation along the floor. Do not transport with food and feedstuffs. Unbreakable packaging. Put breakable packaging into closed unbreakable container.
Physical dangers The vapour is heavier than air. As a result of flow, agitation, etc. Chemical dangers Decomposes on heating or on burning and on contact with hot surfaces. Reacts violently with strong oxidants, strong bases and metals such as aluminium powder and magnesium powder. This generates fire and explosion hazard. Attacks some forms of plastic, rubber and coatings. Formula: CH 2 Cl 2 Molecular mass: Routes of exposure The substance can be absorbed into the body by inhalation, by ingestion and through the skin.
Effects of short-term exposure The substance is irritating to the eyes, skin and respiratory tract. If swallowed the substance may cause vomiting and could result in aspiration pneumonitis. The substance may cause effects on the central nervous system, blood, liver, heart and lungs. Exposure could cause carbon monoxide poisoning. This may result in impaired functions. Exposure at high concentrations could cause lowering of consciousness and death. The effects may be delayed. Effects of long-term or repeated exposure The substance may have effects on the central nervous system.
This substance is probably carcinogenic to humans. Do NOT use in the vicinity of a fire or a hot surface, or during welding.
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