Mercury thiocyanate thermal decomposition

Référence de la vidéo 11941464
Mercury thiocyanate thermal decomposition. Footage of the snake-like growth of the structures formed during the thermal decomposition of a sample of mercury (II) thiocyanate (Hg(SCN)2). The heat is supplied by a blowtorch. This effect is sometimes known as 'Pharaoh's serpent', and was used for entertainment value in the 19th century before it was discovered that the compound is toxic. This type of reaction, where a substance swells on exposure to heat, is known as an intumescent reaction.
Licence : Droits gérés
Crédit : Science Photo Library / RHYS LEWIS & MINH TAN PHAM, AHS, DECD, UNISA
Model Release : Non requis
Durée : 02:23 Minutes
Aspect ratio : 16/9
Restrictions : -

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