1305-99-3 Usage
Description
CALCIUM PHOSPHIDE, with the molecular formula Ca3P2 and a molecular weight of 182.1825 g/mol, is a red-brown crystalline material that appears as crystals or gray granular lumps. It has a melting point of 1605°C and a density of 2.51 g/cm3. CALCIUM PHOSPHIDE reacts with water to form calcium hydroxide and phosphine, a flammable and poisonous gas that ignites spontaneously upon contact with air. It is insoluble in ethanol and has a musty odor, somewhat like acetylene. CALCIUM PHOSPHIDE is easily prepared by reacting the metal with red phosphorus at high temperatures.
Uses
Used in Signal Fires:
CALCIUM PHOSPHIDE is used as an ignition source for signal fires due to its ability to release phosphine, which ignites spontaneously upon contact with air.
Used in Purification of Copper and Copper Alloys:
CALCIUM PHOSPHIDE is used as a reagent in the purification process of copper and copper alloys, aiding in the removal of impurities.
Used as Rodenticide:
CALCIUM PHOSPHIDE is used as a rodenticide, with its strong, pungent garlic-like odor attracting rodents. The odor, however, has a repulsive effect on other animals, who are not receptive to the smell.
Used in Incendiary Bombs and Other Explosives:
CALCIUM PHOSPHIDE is used as a component in incendiary bombs and other explosives due to its ability to release phosphine upon contact with acids or water, which ignites spontaneously.
Used in Fireworks:
CALCIUM PHOSPHIDE is used in the production of fireworks, where its reaction with water to release phosphine contributes to the visual and auditory effects.
Used in Torpedoes:
CALCIUM PHOSPHIDE is used in torpedoes, where its reaction with water to release phosphine can be utilized for ignition or propulsion purposes.
Used in Self-Igniting Naval Pyrotechnic Flares:
CALCIUM PHOSPHIDE is used in self-igniting naval pyrotechnic flares, where its reaction with water to release phosphine can be employed for illumination or signaling purposes.
Used in Water-Activated Ammunition:
CALCIUM PHOSPHIDE is used in water-activated ammunition, where its reaction with water to release phosphine can be utilized for ignition or propulsion purposes.
Reactivity Profile
CALCIUM PHOSPHIDE and hydrochloric acid undergo a very energetic reaction [Mellor 8:841 1946-47]. Calcium and other alkaline earth phosphides incandesce in oxygen when heated.
Hazard
Dangerous fire risk; decomposed by water
to phosphine, which is highly toxic and flammable.
See phosphine.
Health Hazard
Inhalation or ingestion causes faintness, weakness, nausea, vomiting. External contact with dust causes irritation of eyes and skin.
Fire Hazard
Behavior in Fire: Can cause spontaneous ignition if wet. Contributes dense smoke of phosphoric acid.
Safety Profile
Highly toxic due to
phosphde, which in presence of moisture
emits phosphine. The phosphine may ignite
spontaneously in air. Incandescent reaction
with oxygen at 300°C. Incompatible with
dichlorine oxide. When heated to
decomposition it emits toxic fumes of POx.
See also CALCIUM COMPOUNDS and
PHOSPHIDES.
Potential Exposure
A strong reducing agent. Forms spontaneously combustible phosphine gas in moist air. Contact
with water or acids release phosphine gas, and can cause
explosions. Incompatible with oxidizers (chlorates, nitrates,
peroxides, permanganates, perchlorates, chlorine, bromine,
fluorine, etc.); contact may cause fires or explosions. Keep
away from alkaline materials, strong bases, strong acids,
oxoacids, epoxides, chlorine monoxide, halogens, halogen
acids, oxygen, sulfur
Shipping
UN1360 Calcium phosphide, Hazard Class: 4.3;
Labels: 4.3-Dangerous when wet material
Incompatibilities
A strong reducing agent. Forms spontaneously combustible phosphine gas in moist air. Contact
with water or acids release phosphine gas, and can cause
explosions. Incompatible with oxidizers (chlorates, nitrates,
peroxides, permanganates, perchlorates, chlorine, bromine,
fluorine, etc.); contact may cause fires or explosions. Keep
away from alkaline materials, strong bases, strong acids,
oxoacids, epoxides, chlorine monoxide, halogens, halogen
acids, oxygen, sulfur
Waste Disposal
Disposal of unused product
must be undertaken by qualified personnel who are
knowledgeable in all applicable regulations and follow all
pertinent safety precautions including the use of appropriate protective equipment. For proper handling and disposal, always comply with federal, state, and local
regulations
Check Digit Verification of cas no
The CAS Registry Mumber 1305-99-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,3,0 and 5 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1305-99:
(6*1)+(5*3)+(4*0)+(3*5)+(2*9)+(1*9)=63
63 % 10 = 3
So 1305-99-3 is a valid CAS Registry Number.
InChI:InChI=1/3Ca.2P/q;;+2;2*-1/r2CaP.Ca/c2*1-2;/q2*-1;+2
1305-99-3Relevant articles and documents
Thermodynamic properties of
Zaitsev, A. I.,Korolyov, N. V.,Mogutnov, B. M.
, p. 11 - 23 (1991)
A Knudsen-effusion technique in combination with a mass-spectral analysis of the vapour phase has been applied to study thermodynamic properties of alloys (0.5 under x under 1) over the temperature range 650 K to 1537 K.The compound CaP was found to be unstable and to decompose at low temperatures into Ca3P2 and gaseous phosphorus.Evaporation of the phosphide Ca3P2 was followed by congruent decomposition.The standard molar Gibbs energy of formation of Ca3P2 from red phosphorus and solid calcium has been expressed by the equation: .Thermodynamic functions of (1) have been estimated with help of ΔfGdegm(Ca3P2) values and the coordinates of a point on the line of the two-phase equilibrium (Ca3P2 + 1).It has been shown that the liquid solution can be described by the ideal-associated-solution model if complexes of Ca3P2 type are assumed to exist.
Structural Phase Transitions and Superconductivity Induced in Antiperovskite Phosphide CaPd3P
Eisaki, Hiroshi,Fujihisa, Hiroshi,Gotoh, Yoshito,Hirose, Hishiro T.,Ishida, Shigeyuki,Iyo, Akira,Kawashima, Kenji,Ninomiya, Hiroki,Terashima, Taichi,Yoshida, Yoshiyuki
, p. 12397 - 12403 (2020/09/15)
In this study, we succeeded in synthesizing new antiperovskite phosphides MPd3P (M = Ca, Sr, Ba) and discovered the appearance of a superconducting phase (0.17 ≤ x ≤ 0.55) in a solid solution (Ca1-xSrx)Pd3P. Three perovskite-related crystal structures were identified in (Ca1-xSrx)Pd3P, and a phase diagram was built on the basis of experimental results. The first phase transition from centrosymmetric (Pnma) to noncentrosymmetric orthorhombic (Aba2) occurred in CaPd3P near room temperature. The phase transition temperature decreased as Ca2+ was replaced with a larger-sized isovalent Sr2+. Bulk superconductivity at a critical temperature (Tc) of approximately 3.5 K was observed in a range of x = 0.17-0.55; this was associated with the centrosymmetric orthorhombic phase. Thereafter, a noncentrosymmetric tetragonal phase (I41md) remained stable for 0.6 ≤ x ≤ 1.0, and superconductivity was significantly suppressed as samples with x = 0.75 and 1.0 showed Tc values as low as 0.32 K and 57 mK, respectively. For further substitution with a larger-sized isovalent Ba2+, namely, (Sr1-yBay)Pd3P, the tetragonal phase continued throughout the composition range. BaPd3P no longer showed superconductivity down to 20 mK. Since the inversion symmetry of structure and superconductivity can be precisely controlled in (Ca1-xSrx)Pd3P, this material may offer a unique opportunity to study the relationship between inversion symmetry and superconductivity.
