FS smoke

Si, and stannic tetrachloride. An effective smoke agent, whether it be mechanically dispersed from an aircraft spray tank or vaporized thermally, is a mixt of S trioxide and chlorosulfonic acid (FS smoke agent) which upon hydrolysis forms sulfuric and hydrochloric acid dispersions. Of course, all such formulations are highly corrosive, and, if not outright toxic, then conducive to pulmonary edema... 

Type 100 50-kg Smoke Bomb consisted of thin-steel body filled with FS smoke compn (chlorosulfonic acid 41, sulfur trioxide 54 sulfuric acid 5%). The HE chge in the nose and in the burster was PA (p 21) ... 

None for ordinary smoke gas masks for hi concentrations, only rubber gloves forliandling liquid ( Any alkali, solid or solution Like an acid burn From cylinders mulvr g03 pressure air-plane spray tan ks explosive shell 1 yellow baud FS smoke... 

Sulfur trioxide-chlorosulfonic acid (military designation, FS smoke) consists of 50% (weight/ weight) sulfur trioxide (SO3) and 50% (weight/ weight) chlorosulfonic acid [SO2(OH)C1], FS smoke is typically dispersed by spray atomization. The sulfur trioxide evaporates from spray particles, reacts with moisture in the air, and forms sulfur acid, which condenses into droplets that produce a dense... 

Contact with liquid FS smoke produces a typical mineral acid burn of exposed tissues. Exposure to the smoke—which constitutes exposure to sulfuric acids—produces irritation of the eyes, nose, and exposed skin and complaints of cough, substernal ache, and soreness. After a severe exposure to FS smoke, a casualty demonstrates profuse salivation and an explosive cough, which could render respirator adjustment difficult. The highly irritative nature of the substance acts as an adequate warning, however, and prompts an immediate evacuation from the smoke cloud. 

The CWS stored some ammunition, smoke agents, and toxic agents, about eleven tons of FS smoke, 3,000 HC smoke pots, and nearly 500 tons of bulk toxics almost evenly divided between persistent and non-persistent gases. The departmental ordnance officers stored some toxic and smoke-filled ammunition. The departmental CWS carefully hoarded 32 4.2-inch chemical mortars, aware that the whole Army had only 44. ... 

Seventh Army Cml Sec, Hist Rpt, i Jan 44 to 31 Oct 44. A unique employment of the liquid smoke saw LCM s (landing craft, mechanized) equipped with a contraption which forced the FS smoke through an ejection pipe where it was dispersed in a cloud by the blast of an airplane propeller. 

When an industrial survey disclosed that large quantities of the FS smoke material could be produced in Australia, Colonel Copthorne, Chief Chemical Officer, USASOS SWPA, assigned the 426 Chemical... 

A mixture of chlorosulfonic acid and sulfur trioxide in the ratio 45 55, known as FS, is widely employed as a chemical smoke in warfare (Chapter 7, ref. 1). The addition of red lead oxide (0.04-0.1%) to the mixture has been shown to inhibit corrosion of the steel and aluminium tanks used to store the FS smoke mixture. Other studies demonstrated that stainless steels can be protected from corrosion by chlorosulforic acid by the introduction of nitrate and/or nitrite ions. Commercial chlorosulfonic acid should contain almost no iron a typical analysis would be as follows 98-99,5% purity with H2SO4 (0.2-2%) free SO3 (0-2%) free HCl (0-0.5%) and Fe (5-30 ppm). ... 

Starting with one basic type of shell in 1942, the CWS evolved a variety of shells for the 4.2-inch mortar. Only three of these, HE, white phosphorus, and FS smoke, were employed in battle, but their effectiveness led Generalleutnant Oschner to say, in speaking of the American mortar, that "the various types of ammunition used with it are excellent. ... 

CWTC Item 13, Tanks, Airplane Chemical Spray, Approval of Military Characteristics, 3 Aug 37. (2) TB 3-255A-1, Airplane Smoke Tank MlO, 8 Nov 44. (3) Capt H. E. Lott and Harry O. Huss, FS Smoke CurtainsTrom Airplane Spray Tanks MlO and M33. TDMR 805, 7 Mar 44. (4) Crawford, Cook, and Whiting, Statistics, "Procurement," p. 24. 

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