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Calciumacetylid Produkt Beschreibung

Calcium carbide Struktur
75-20-7
CAS-Nr.
75-20-7
Bezeichnung:
Calciumacetylid
Englisch Name:
Calcium carbide
Synonyma:
carbide;ELECTROLITE;Acetylenogen;Calciumcarbid;carburocalcico;ethyne,calciuM;carburo calcic;Acetylenestones;CALCIUM CARBIDE;carburedecalcium
CBNumber:
CB5854217
Summenformel:
C2Ca
Molgewicht:
64.1
MOL-Datei:
75-20-7.mol

Calciumacetylid Eigenschaften

Schmelzpunkt:
447°C
Siedepunkt:
2300°C
Dichte
2.22 g/mL at 25 °C(lit.)
storage temp. 
water-free area
Aggregatzustand
pieces
Farbe
Gray-black
Wichte
2.22
Wasserlöslichkeit
hydrolyses
Sensitive 
Moisture Sensitive
Merck 
14,1656
BRN 
3909011
Stabilität:
Stability Reacts violently with water liberating highly flammable gas (acetylene). Do not use water if this material is involved in a fire. Incompatible with moisture, water, strong oxidizing agents, alcohols, hydrogen chloride, magnesium.
InChIKey
UIXRSLJINYRGFQ-UHFFFAOYSA-N
EPA chemische Informationen
Calcium carbide (75-20-7)
Sicherheit
  • Risiko- und Sicherheitserklärung
  • Gefahreninformationscode (GHS)
Kennzeichnung gefährlicher F
R-Sätze: 15-41-37/38
S-Sätze: 8-43-43A-39-26
RIDADR  UN 1402 4.3/PG 2
WGK Germany  1
10-21
TSCA  Yes
HazardClass  4.3
PackingGroup  II
HS Code  28491000
Giftige Stoffe Daten 75-20-7(Hazardous Substances Data)
Bildanzeige (GHS)
Alarmwort Achtung
Gefahrenhinweise
Code Gefahrenhinweise Gefahrenklasse Abteilung Alarmwort Symbol P-Code
H260 In Berührung mit Wasser entstehen entzündbare Gase, die sich spontan entzünden können. Stoffe und Gemische, die in Berührung mit Wasser entzündbare Gase entwickeln Kategorie 1 Achtung P223, P231+P232, P280, P335+ P334,P370+P378, P402+P404, P501
H261 In Berührung mit Wasser entstehen entzündbare Gase. Stoffe und Gemische, die in Berührung mit Wasser entzündbare Gase entwickeln (Kapitel 2.12), Kategorie 2 (Water-react. 2), H261 Stoffe und Gemische, die in Berührung mit Wasser entzündbare Gase entwickeln (Kapitel 2.12), Kategorie 2 Achtung
Warnung
P231+P232, P280, P370+P378,P402+P404, P501
H315 Verursacht Hautreizungen. Hautreizung Kategorie 2 Warnung P264, P280, P302+P352, P321,P332+P313, P362
H318 Verursacht schwere Augenschäden. Schwere Augenschädigung Kategorie 1 Achtung P280, P305+P351+P338, P310
H335 Kann die Atemwege reizen. Spezifische Zielorgan-Toxizität (einmalige Exposition) Kategorie 3 (Atemwegsreizung) Warnung
Sicherheit
P223 Keinen Kontakt mit Wasser zulassen.
P261 Einatmen von Staub vermeiden.
P280 Schutzhandschuhe/Schutzkleidung/Augenschutz tragen.
P231+P232 Unter inertem Gas handhaben. Vor Feuchtigkeit schützen.
P305+P351+P338 BEI KONTAKT MIT DEN AUGEN: Einige Minuten lang behutsam mit Wasser spülen. Eventuell vorhandene Kontaktlinsen nach Möglichkeit entfernen. Weiter spülen.
P370+P378 Bei Brand: zum Löschen verwenden.
P405 Unter Verschluss aufbewahren.
P422 Inhalt in/unter inertem Gas aufbewahren.

Calciumacetylid Chemische Eigenschaften,Einsatz,Produktion Methoden

ERSCHEINUNGSBILD

GRAUE KRISTALLE ODER SCHWARZE STüCKE MIT CHARAKTERISTISCHEM GERUCH.

ARBEITSPLATZGRENZWERTE

TLV nicht festgelegt (ACGIH 2005).
MAK nicht festgelegt (DFG 2005).

AUFNAHMEWEGE

Aufnahme in den Körper durch Inhalation.

INHALATIONSGEFAHREN

Verdampfung bei 20°C vernachlässigbar; eine gesundheitsschädliche Partikelkonzentration in der Luft kann jedoch schnell erreicht werden, vor allem als Pulver.

WIRKUNGEN BEI KURZZEITEXPOSITION

WIRKUNGEN BEI KURZZEITEXPOSITION:
ätzend. Die Substanz verätzt die Augen, die Haut und die Atemwege. Inhalation der Substanz kann zu Lungenödem führen (s.Anm.).

LECKAGE

Alle Zündquellen entfernen. Verschüttetes Material in sauberen, trockenen Behältern sammeln. Reste sorgfältig sammeln. An sicheren Ort bringen. Kein Wasser verwenden.

R-Sätze Betriebsanweisung:

R15:Reagiert mit Wasser unter Bildung hochentzündlicher Gase.

S-Sätze Betriebsanweisung:

S8:Behälter trocken halten.
S43:Zum Löschen . . . (vom Hersteller anzugeben) verwenden (wenn Wasser die Gefahr erhöht, anfügen: "Kein Wasser verwenden").

Beschreibung

Calcium carbide,is a binary salt. It is a grayish-black hard solid that reacts with water to produce acetylene gas, a solid corrosive that is calcium hydroxide, and release heat. Acetylene gas is manufactured by reacting calcium carbide with water. Because acetylene is so unstable, it is not shipped in bulk quantities.
Calcium carbide is shipped to acetylene-generating plants where it is reacted with water in a controlled reaction. After the reaction process, the acetylene gas is placed into specially designed containers with a honeycombed mesh inside for shipment and use. It is dissolved in acetone for stability. Calcium carbide has a specific gravity of 2.22, which is heavier than water. The four-digit UN identification number for calcium carbide is 1402. The NFPA 704 designation is health 3, flammability 3, and reactivity 2. The white section at the bottom of the diamond contains a W with a slash through it, indicating water reactivity. It is shipped in metal cans, drums, and specially designed covered bins on railcars and trucks. When shipped and stored, it should be kept in a cool, dry place. Primary uses are in the generation of acetylene gas for welding, vinyl acetate monomer, and as a reducing agent.

Chemische Eigenschaften

grey or black solid with a garlic-like odour

Physikalische Eigenschaften

Grayish-black orthorhombic crystal; density 2.22 g/cm3; melts at 2,200°C; reacts with water.

Verwenden

Calcium carbide (CaC2) has a garlic-like odor and reacts with water to form acetylene gas plus calcium hydroxide and heat. In the past, it was used in miners’ lamps to continuously produce a small acetylene flame to provide some illumination in coal mines.

Verwenden

Calcium carbide is the most relevant carbide industrially because of its important role as the basis of acetylene industry. In locations where there is shortage of petroleum, Calcium Carbide is used as the starting material for the production of acetylene (1 kg of carbide yields ~300 liters acetylene), which, in turn, can be used as a building block for a range of organic chemicals (e.g. vinyl acetate, acetaldehyde and acetic acid). In some locations, acetylene is also used to produce vinyl chloride, the raw material for the production of PVC.
A less important use of Calcium Carbide is related to the ferilizers industry. It reacts with nitrogen to form calcium cyanamide, which is the starting material for the production of cyanamide (CH2N2). Cyanamide is a common agricultural product used to stimulate early foliation.
Calcium Carbide can also be employed as desulfurizing agent for producing low-sulfur carbon steel. Also, it is used as a reducing agent to produce metals from their salts, e.g., for direct reduction of copper sulfide to metallic copper.

synthetische

Calcium carbide (CaC2) is manufactured by heating a lime and carbon mixture to 2000 to 2100°C (3632 to 3812°F) in an electric arc furnace. At those temperatures, the lime is reduced by carbon to calcium carbide and carbon monoxide (CO), according to the following reaction: CaO + 3C → CaC2 + CO
Lime for the reaction is usually made by calcining limestone in a kiln at the plant site. The sources of carbon for the reaction are petroleum coke, metallurgical coke, and anthracite coal. Because impurities in the furnace charge remain in the calcium carbide product, the lime should contain no more than 0.5 percent each of magnesium oxide, aluminum oxide, and iron oxide, and 0.004 percent phosphorus. Also, the coke charge should be low in ash and sulfur. Analyses indicate that 0.2 to 1.0 percent ash and 5 to 6 percent sulfur are typical in petroleum coke. About 991 kilograms (kg) (2,185 pounds [lb]) of lime, 683 kg (1,506 lb) of coke, and 17 to 20 kg (37 to 44 lb) of electrode paste are required to produce 1 megagram (Mg) (2,205 lb) of calcium carbide.

Reaktionen

Calcium carbide is grayish-black solid, reacts with water yielding acetylene gas and calcium hydroxide, formed at electric furnace temperature from calcium oxide and carbon.

Allgemeine Beschreibung

Grayish-black irregular lump solid. Used to make acetylene and in steel manufacture.

Air & Water Reaktionen

Reacts rapidly with water to generate the flammable gas acetylene and the base calcium hydroxide. Enough heat may be generated to ignite the gas [Jones, G.W. BM Report Invest. 3755 1944].

Reaktivität anzeigen

Calcium carbide is a reducing agent. May react vigorously with oxidizing materials. The powdered mixture of the acetylide and iron oxide and iron chloride burns violently upon ignition, producing molten iron. Calcium carbide incandesces with chlorine, bromine, or iodine at 245, 350, or 305°C., respectively, [Mellor, 1946, Vol. 5, 862]. The carbide burns incandescently when mixed and heated with lead difluoride, magnesium, hydrogen chloride, and tin (II) chloride, [Mellor, 1946, 1940, 1946, and 1941], respectively. Interaction of Calcium carbide with methanol to give calcium methoxide is vigorous , but subject to an induction period of variable length. Once reaction starts, evolution of acetylene gas is very rapid, unpublished observations [Bretherick 1995]. Mixing Calcium carbide with silver nitrate solutions forms silver acetylide, a highly sensitive explosive. Copper salt solutions would behave similarly, [Photogr. Sci. Eng., 1966, 10, 334]. The mixture of Calcium carbide and sodium peroxide is explosive, as is Calcium carbide and perchloryl fluoride as gases at 100-300°C.

Hazard

Forms flammable and explosive gas and corrosive solid with moisture.

Health Hazard

It is a corrosive solid. Because it is highlywater-reactive, skin contact can cause burn.

Brandgefahr

Behavior in Fire: If wet by water, highly flammable acetylene gas is formed.

Sicherheitsprofil

Reaction on contact with moisture forms explosive acetylene gas. Flammable on contact with moisture, acid or acid fumes; evolves heat or flammable vapors. Moderate explosion hazard. Incandescent reaction with Cl2 (245℃), Brz (350℃), IS (305℃), HCl gas + heat, PbF2, Mg + heat. Incompatible with Se, (KOH + Ch), AgNO3, Na2O2, SnCl2, S, water. Mixtures with iron(IⅡ) chloride, iron(IⅡ) oxide, tin(Ⅱ) chloride are easily ignited and burn fiercely. Vigorous reaction with methanol after an induction period. Addttion to silver nitrate solutions precipitates the dangerously explosive silver acetylide. Copper salt solutions behave similarly. See also CALCIUM HYDROXIDE and ACETYLENE.

Calciumacetylid Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte


Calciumacetylid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

Global( 128)Lieferanten
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Henan DaKen Chemical CO.,LTD.
+86-371-66670886
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Henan Tianfu Chemical Co.,Ltd.
0371-55170693
0371-55170693 info@tianfuchem.com CHINA 22607 55
Hebei Guanlang Biotechnology Co., Ltd.
+8619930503282
sales3@crovellbio.com China 5892 58
Xiamen AmoyChem Co., Ltd
+86 592-605 1114
sales@amoychem.com CHINA 6369 58
Hubei xin bonus chemical co. LTD
86-13657291602
027-59338440 linda@hubeijusheng.com CHINA 23035 58
Shanghai Longyu Biotechnology Co., Ltd.
+8615821988213
+86 15821988213 info@longyupharma.com China 2473 58
career henan chemical co
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75-20-7(Calciumacetylid)Verwandte Suche:


  • carburedecalcium(french)
  • carburocalcico
  • calciumcarbide(cac2)
  • calciumdicarbide
  • carburedecalcium
  • Calciumcarbid
  • Calcium Carbide, Anhydrous
  • Calcium Carbide, 10-40 Mesh
  • CALCIUM CARBIDE, 97+%
  • carburo calcic
  • ethyne,calciuM
  • Calcium carbide granulated, technical, >=75% (gas-volumetric)
  • CalciuM carbide pieces, thickness <10 MM , typically, technical grade, ~80%
  • ethyne,calciumderiv
  • Calciumcarbidemetallurggradegreylumpsmm
  • carbide
  • CALCIUM CARBIDE, GRANULATED, 0.3-1 MM
  • Calcium carbide, pieces, typically <10mm thick, tech., ~80%
  • TechnicalCalciumCarbide
  • Calcium carbide, metallurg.grade, grey lumps, 9-40 mm
  • Calciumcarbide,75-82%
  • CALCIUMCARBIDE,LUMP
  • Acetylenestones
  • calciumacetylide(ca(c2))
  • ELECTROLITE
  • CALCIUM CARBIDE
  • CALCIUM ACETYLIDE
  • Acetylenogen
  • Calcium Carbide (technical grade ~ 80%)
  • 75-20-7
  • C2H2Ca
  • CaC2
  • C2Ca
  • Carbides
  • Ceramics
  • Metal and Ceramic Science
  • inorganic chemical raw material
  • Non metallic mineral
  • Inorganics
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