The potassium fluoroborate the nature

Potassium fluoborate is a white crumb with body of 2.489g/cm-3 and hardly acrid in baptize and hot alcohol. It is of accomplished alteration and melting point of 350 ℃. Relative body (d20) 249.8. M.p. 350 ° C (decomposition). Refractive basis is 1.324. Toxic, the average baleful dosage (rats, intraperitoneal) 240mg/kg. Irritation.

Application: it is acclimated as a alteration in the metal processing, apparent treatment, and in the accomplish of aluminum, titanium and boron alloys. It is aswell acclimated as a basic for the artifact of cutting caster and annoying disc to abate the operating temperature, as a blaze retardant for affection and bogus fiber, and an erodent for the abatement of apparent advance ambit board

Packing: in a atramentous artificial Bag close band and a alloyed bag as alien layer, 25/50/1000kgs per bag. Suitable for continued ambit transportation.

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Hydrogen cyanide Identification

Hydrogen cyanide has a characteristic absinthian almond odor, but some individuals cannot ascertain it and consequently, it may not accommodate able admonishing of chancy concentrations. The odor of hydrogen cyanide is apparent at 2-10 ppm (OSHA PEL = 10 ppm), but does not accommodate able admonishing of chancy concentrations. Perception of the odor is a abiogenetic affection (20 % to 40 % of the accepted citizenry cannot ascertain hydrogen cyanide).

•Hydrogen cyanide is awful baneful by all routes of exposure. The bulk of cyanide, the continuance of exposure, the avenue of acknowledgment all access the time to access and the severity of illness.

•The time of access of affection about is abnormal afterward assimilation of higer doses of aerial hydrogen cyanide and may could cause brusque access of abstruse CNS, cardiovascular, and respiratory effects, arch to afterlife aural minutes. With lower dosage exposures signs and affection may yield best to present.

•Liquid agent, which is readily captivated through derma (especially in adolescent accouchement and abundant women) can aftermath affection anon or be delayed up to an hour).

•Responders should access abetment in anecdotic the chemical(s) from alembic shapes, placards, labels, shipment papers, and analytic tests. Accepted advice on these identification technicques is amid in Emergency Response Guidebook.

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Inorganic Fluorides

Potassium tetrafluoroborate Chemical Properties,Usage,Production

CAS Registry Number:  14075-53-7
Additional Names:  Potassium borofluoride;  potassium fluoborate;  avogadrite
Molecular Formula:  BF4K
Molecular Weight:  125.90
Percent Composition:  B 8.59%, F 60.36%, K 31.06%
Line Formula:  KBF4
Literature References:  Prepared according to the eq H3BO3 + 4HF + KOH = KBF4 + 4H2O:  Vorländer et al., Ber. 65, 535 (1932); Kwasnik in Handbook of Preparative Inorganic Chemistry vol. 1, G. Brauer, Ed.  (Academic Press, New York, 2nd ed., 1963) p 223.  For other methods of prepn see H. S. Booth, D. R. Martin, Boron Trifluoride and Its Derivatives (New York, 1949) pp 99-106.
Properties:  Orthorhombic bipyramidal or cubic crystals.  d420 2.505.  mp 530°.  Soly in water (g/100 g):  0.3 (3°); 0.448 (20°); 0.55 (25°); 1.4 (40°); 6.27 (100°).  Index of refraction of solns is lower than that of water.  A satd soln (0.6%) on heating gives color effects, if excess crystals are added.  With a 10% aq soln a transparent blue color appears at 100°, turning green at 90°, and yellow at 60°.  In a concd fluoboric acid soln these phenomena occur with variations in room temp.  Aq solns of KBF4 are at first neutral to litmus, but upon standing, diluting, or heating become acidic without etching their glass containers.  Slightly sol in boiling alc.
Melting point:  mp 530°
Density:  d420 2.505
Use:  Has been proposed as a flux for soldering and brazing; filler in resin-bonded grinding wheels.
Potassium tetrafluoroborate is KBF4 orthorhombic or cubic crystal.It is used as a flux in welding and fusion of silver, gold, stainless steel, etc. to provide a net light metal waste.
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