Fume hoods corrosion

The MSDS (46) for thiophosgene describes it as highly toxic, corrosive lachrymator and moisture sensitive compound. It may be fatal if inhaled, swallowed, or absorbed through the skin. When using this material one should wear the appropriate NIOSH/OSHA-approved respirator, chemical-resistant gloves, safety goggles, and other protective clothing. It should be used only in a chemical fume hood. 

In a case where a fiune hood was to be placed on a portion of counter faced with plastic laminate, the planner found an economical solution. Since the plastic laminate was not suitable for use with a fume hood, he ordered a sheet of monolithic material Va inch thick and had it cut to the exact dimensions of the hood. The cost was just a fraction of that of a full thickness top. The sheet was put in place and the edges were treated with a silicone compound. This treatment stood up against highly corrosive materials as weU as heat for many years. 

Normally, outlets are not placed inside fume hoods, where they may suffer from corrosive effects or present an explosion hazard. Many hoods will permit outlets to be mounted on either or both sides of the exterior, somewhat above bench level. 

Butanediol diglycidyl ether is a viscous liquid having a density of 1.45 at 20°C. It is a hygroscopic, corrosive compound with a displeasing odor that should be handled with care in a fume hood. Aqueous solutions of the bis-epoxide usually possess a characteristic oily film on their surfaces, indicating the limited solubility of the reagent. 

CAUTION Many organotin compounds are known to be highly toxic 2 (Note 1), and hydrogen bromide (HBr), titanium tetrachloride (TiCi4), and trimethylsilyl trifluoromethanesulfonate (TMSOTf) are corrosive. Steps A-C should be performed in an efficient fume hood while wearing gloves and adequate eye protection. 

CAUTION Hydrofluoric acid (HF) is highly toxic and corrosive, and severely irritating to the respiratory system and eyes All operations should be performed in a well-ventilated fume hood using appropriate safety precautions and procedures. 

Caution. HCl in Et20 is corrosive and lachrymatory. All manipulations should be carried out in a fume hood and gloves worn. 

Since the inside of the oven will be exposed to corrosive HF and AIF3 vapors, an old drying oven is preferred that is vented througji the top to a fume hood. Alternatively, a small vacuum oven may be used, but the vacuum applied should be minimal. 

Caution. Arsenic compounds are poisonous. Concentrated hydrogen peroxide can cause severe burns. Hydrofluoric acid is neurotoxic and corrosive, and causes severe burns. All manipulations should be conducted in an efficient fume hood, and gloves and goggles should be worn. 

Caution. Trifluoromethanesulfonic acid is harmful by inhalation, in contact with skin, and if swallowed. It causes bums. Precautions should be taken to minimize inhalation of the corrosive vapors given off from the acid. Trifluoro-methanesulfonatosilver(I) is an eye, respiratory system, and skin irritant. Methyl-diphenylphosphine is harmful by inhalation, in contact with skin, and if swallowed. Tetrahydrothiophene is an eye, respiratory system, and skin irritant. It is necessary to wear suitable protective clothing, gloves, and eye/face protection. All the reactions must be conducted in a well-ventilated fume hood. 

Caution. Fuming sulfuric acid (oleum) is corrosive, a strong oxidant, and toxic. Protective clothing should be worn when handling oleum. The material should be used in an efficient fume hood. 

Caution. Br2 is a corrosive liquid with toxic vapors it should be handled under a fume hood by wearing protective gloves. 

Caution. Bromine is corrosive and a health hazard. This procedure should be completed in a good fume hood and rubber gloves should be worn ... 

Caution Molecular F2 is a very toxic and corrosive gas the reactions should be carried out in an efficient fume hood and the handler should be familiar with the correct precautions. A reaction apparatus for working with elemental F2 is recommended.22... 

CAUTION Hydrochloric acid is very corrosive, and ION hydrochloric acid releases hydrochloric acid gas when exposed to air. Wear goggles, gloves, and protective clothing, and measure in a well-ventilated area, preferably a fume hood. 

Caution Perform tests involving perchloric acid under a corrosion-resistant fume hood. 

Solid iodine is corrosive to the skin handle it with care if it is necessary to make up your own stock solutions. Iodine solutions can cause bad stains, but if handled properly, they are not a significant health hazard. The important safety precautions are (1) Do not pipette by mouth, as already stressed in the procedure above (2) store CCI4 liquid and solutions ofli in CCI4 in a fume hood and carry out all transfers from the stock bottle to a stoppered flask in this hood and (3) dispose of waste materials properly, i.e., place used CCI4 in a storage bottle kept in the hood. 

In the academic laboratory, practicality is typically the most important consideration. Because the amounts of substances used are usually small, hazardous materials can be handled by using fume hoods, safety shields, and so on expense, although always a consideration, is not a primary factor. However, for any industrial process, economy and safety are critical. In industry, containers and pipes are metal rather than glass, and corrosion is a constant problem. In addition, since the progress of reactions cannot be monitored visually, gauges must be used. 

Caution. Lithium diphenylarsenide and lithium diphenylphosphide are strong bases and very corrosive, and contact of them with the skin should be avoided. Hydrolysis of both compounds is vigorous and generates the malodorous and toxic secondary arsine or phosphine. Hence these experiments should be conducted in a fume hood. The products and the intermediates are also toxic and should be handled with due care. All manipulations should be done under nitrogen. 

Handling, Storage, and Precautions corrosive and moisture-sensitive. This reagent should be handled in a fume hood. 

CAUTION The silane reagent is volatile and corrosive. Use in a good fume hood. Do not breathe the vapor. 

CAUTION Due to the hazardous nature of HF [highly toxic vapor, highly corrosive liquid, a gas at room temperature (bp 19°C) dissolves glass vigorously], appropriate equipment MUST be used in a good fume hood. 

CAUTION HBF is extremely corrosive and toxic. Use only in a good fume hood wear protective gloves... 

Caution. Hydrofluoric acid is toxic and highly corrosive. All operations with it should be carried out in an efficient fume hood. It should not be inhaled. Polyethylene gloves should be used while handling it. 

Caution. All reactions should be conducted In a well-ventilated fume hood with appropriate precautions. Arsenic and antimony pentafluoride and arsenic trifluoride are very poisonous and hydrolyze readily to form Bromine is corrosive and is harmful to the skin and mucous membranes. Sulfur dioxide is poisonous and can generate 3 to 4 atmospheres pressure at room temperature. Well-constructed glass vessels or metal systems must be employed to prevent pressure bursts. The use of rubber gloves, safety glasses, and face shields is recommended. 

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