Reactions Storage

Handling and Storage. Cyanamide solution dimerizes to dicyandiamide and urea with the evolution of heat and a gradual increase in alkalinity accelerating the reaction. Storage above 30°C without pH stabilizer leads to excessive dimerization and can result in violent exothermic polymerization. Cyanamide should be stored under refrigeration and the pH tested periodically. Stabilized cyanamide can be kept at ambient temperature for a few weeks. 

Pressure vessels and tanks may be used for reactions, storage of raw materials, conlaimnenl of chemical inlennediales or products, and pliase separations. Tlie... 

Organic catalysts are generally insensitive to the oxygen and moisture in our natural atmosphere and, as such, do not require the use of air- and moisture-free reaction/storage vessels, inert-gas atmospheres, and moisture-free reagents/sol vents. 

Alkali metals. The principal hazards involved are l)explosions or fire resulting from contact with water, chlorinated hydrocarbons, or other reactive agents 2)fires resulting from exposure to air 3)personnel injury from direct contact with hot alkali metals and 4)caustic soda burns from the residue of a Na-H20 reaction. Storage areas must be dry. Protective clothing must be worn (Ref 105)... 

SEDEX sensitive detector of exothermal processes Isoperibolic, adiabatic Secondary reactions, storage stability 2-100g 0 100 °C 0.5C ... 

TAM thermal activity monitor Differential, ideal flux Secondary reactions, storage stability 0.5-3 g 30 a 150°C 0.01... 

G. Vladutz and S. R. Gould, in The International Language of Chemistry, W. A. Warr, Ed., Springer Verlag, Berlin, 1988, pp. 371-384. Joint Compound/Reaction Storage and Retrieval and Possibilities of a Hyperstructute-Based Solution. 

By 1986, when we were ready to buy chemical structure software, there was a number of systems on offer. A year earlier the position might have been very different. The main contenders were MACCS, DARC and OSAC, a program derived from the reaction storage and searching program, ORAC. In addition, HTSS and SABRE were of interest although we had doubts about their state of development at the time. 

JOINT COMPOUND/REACTION STORAGE AND RETRIEVAL AND POSSIBILITIES OF A HYPERSTRUCTURE-BASED SOLUTION... 

Toxicology Avoid contact with eyes and skin exposure when aicohoi is consumed may produce an adverse reaction Storage Exc. storage stabiiity (> 4 yrs when stored in cooi, dry piace away from direct sources of heat and iight)... 

Recent developments are generic (Markush) structure storage and retrieval, reaction storage and retrieval, three-dimensional structure searches, and various extensions of documentation in molecular biology. 

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