Marine signals

Uses. The main use for Sr nitrate is for producing red colors in pyrotechnics, railroad fusees, marine signals, tracer compositions and in matches (Refs 2, 4 7). A high degree of purity is required, for the contamination of Sr nitrate with... 

Strontium nitrate [SrlNOj) ], because of the bright red flame it produces when burned, is used in fireworks, matches, marine signals, and so forth. 

Of special geological interest is the isotopic analyses of coeval carbonate-phosphate pairs (Wenzel et al. 2000), which helps to distinguish primary marine signals from secondary alteration effects and sheds light on the causes for 5 0 variations of fossil ocean water. Wenzel et al. (2000) compared Silurian cal-citic brachiopods with phosphatic brachiopods and conodonts from identical stratigraphic horizons. They showed that primary marine oxygen isotope compositions are better preserved in conodonts than in brachiopod shell apatite and suggested that conodonts record paleotemperature and ratios of Silurian sea water. 

Colored light compositions are used in the form of a loose powder, or are tamped into paper tubes in torches for political parades, for highway warnings, and for railway and marine signals, in Bengal lights, in airplane flares, and in lances for set pieces, or are prepared in the form of compact pellets as stars for Roman candles, rockets, and aerial bombs, or as stars to be shot from a special pistol for signaling. 

Miscellaneous Uses.—Calcium phosphide is used in marine signal lights, which are so constructed that they evolve spontaneously inflammable phosphine when thrown into water. 

Uses For tracer powder and red-colored flares. In combination with barium nitrate it is used in aviation for signaling and for illuminating landing fields and military objectives. In marine signals, matches, and railroad flares. 

Use Pyrotechnics, marine signals, railroad flares, matches. 

USE In pyrotechnics (red fire), signal lights, marine signals, railroad flares, matches. 

EINECS 233-131-9 HSDB 787 Nitrate de strontium Nitric xid, strontium salt Strontium dinitrate Strontium nitrate Strontium nitrate (Sr(N03)2) Strontium(ll) nitrate (1 2) UN1507. Pyrotechnics, marine signals, railroad flares, matches. Solid mp = 570° d = 2.99 soluble in HzO (0.66 g/ml), slightly soluble in EtOH, MezCO LOso (rat ip) = 540 mg/kg. Hoechst Celanese Noah Chem. Solvay Deutschland GmbH. 

Precaution Strong oxidizing agent fire risk in contact with organic materials may explode when shocked or heated Hazardous Decomp. Prods. Heated to decomp., emits toxic fumes of NOx NFPA Health 1, Flammability 0, Reactivity 0 Uses In pyrotechnics for prod, of red color marine signals signal lights railroad flares matches... 

Sunflower (Helianthus annuus) seed oil marine signals Strontium nitrate marker, Gl transit time Carmine (Coccus cacti)... 

In the meantime Willson returned to Canada. He there established carbide operations in Merriton, Ontario, and at Shawinigan Falls, Quebec He formed the International Marine Signal Co. to manufacture carbide-energized buoys, and applied himself to the use of the electric furnace for smelting phosphate ores in his remaining years (W). Willson died in 1915, by which time he had seen his invention produce 90,000 tons of calcium carbide annually by 1904 and 250,000 by 1910, from zero in 1892 ( ). He perhaps would have been amazed to have witnessed the growth in the chemical uses of acetylene equivalent to one million tons per year of calcium carbide by 1960, produced in continuous furnaces which were 30 feet in diameter by 15 feet tall, each rated at 30,000 kw ( ). Nor could he have foreseen his furnace eventually supplanted as a source of acetylene by yet another electrothermic process, the direct formation of acetylene in an electric arc used to crack hydrocarbons such as natural gas. 

Jennerjahn, T.C. et al.. Asynchronous terrestrial and marine signals of climate change during Heinrich event. Science, 306, 2236, 2004. 

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