From Big Medical Encyclopedia

LYSOL (cresyl soap) — disinfecting and dezinsitsiruyushchy means from group of the purified cresols. Contains cresol 50 of h, fat to - t from vegetable oil — 25 h, caustic heat in the quantity necessary for neutralization to - t, waters — to 100 h (instead of fat to - and caustic heat t green green soap in number of 50 h can be entered). Content in drug of cresols shall be 50 ± 1%, free alkali in terms of caustic heat — no more than 0,5%, waters — no more than 24%, ud. the weight of a product — 1,022-1,050.

L. — transparent, brown-brown, oily liquid. It is completely dissolved in water with formation of the transparent solutions foaming at agitation. Opalescence of solution is allowed.

On bactericidal properties L. it is close to to phenols (see), but is more active. Vegetative forms of the majority of microorganisms in 2% solution perish within 2 — 15 min. The tubercular stick and disputes of a malignant anthrax keep viability at influence of 10% of solution L. St. 10th hour.

At intestinal and other infections hot water solutions L. apply in concentration: 5 — 10% — for disinfection of rooms and disinfecting of allocations (in the ratio 2:1), 5% — for disinfection of linen (exposure 2 hours), 3% — for wiping of surfaces, 2 — 5% — for disinfection of tools, 0,5 — 1,5% — for disinfecting of hands etc. Solutions L. leave marks on the objects processed by them. Linen even after long rinsing keeps a yellow shade.

L. is less toxic, than phenol. In concentration of 10% and more possesses the strong cauterizing action on mucous membranes. At poisoning as antidote use ovalbumin, milk, lime water with sugar and sodium sulfate in solutions.

Lysol in the medicolegal relation

Court. - the chemical proof of existence of L. in various objects of a research comes down to detection of cresols (the main component of L.). For isolation of cresols the studied material is acidified tartaric or any other organic to - that and subjected to wet distillation. The received distillate is repeatedly extracted ether after preliminary alkalifying by solution of hydrosodium carbonate. Radio extracts gather, filter (via the small filter) and then evaporate ether at the room temperature. The oily rest is dissolved in a small amount of water and investigated by means of two reactions: a) with solution of chloride of oxide iron (gives blue-violet coloring); b) with a bromine water (the fine-crystalline deposit is formed). The last reaction is used also for quantitative definition of cresols.

See also Desinfectants , Cresols .