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HomeProduct name listSODIUM ACETYLIDE

SODIUM ACETYLIDE

Synonym(s):Ethynyl sodium

  • CAS NO.:1066-26-8
  • Empirical Formula: C2HNa
  • Molecular Weight: 48.02
  • MDL number: MFCD00008568
  • EINECS: 213-908-9
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-12-18 14:07:02
SODIUM ACETYLIDE Structural

What is SODIUM ACETYLIDE?

Description

Sodium acetylide is an unstable powder, a salt of acetylene. It is a severe explosion risk when shocked or heated. It is used in the manufacture of detonators.

Chemical properties

brown slurry

The Uses of SODIUM ACETYLIDE

Sodium acetylide suspension has been used in the preparation of: 2-ethynyladamantan-2-ol1 apical-equatorial (ae) isomer of (Et4N)3[1-(2′-B10H9)-2-NH3B10H8]2 trimethylsilylacetylene3

The Uses of SODIUM ACETYLIDE

Sodium Acetylide Suspension is a reagent used in the synthesis of rhodium(I) amidinate complexes.

Definition

ChEBI: The salt formed from the acetylide monoanion and a single sodium cation.

Purification Methods

It sometimes contains diluents, e.g. xylene, butyl ether or dioxane which can be removed by filtration followed by a vacuum at 65-60o/5mm. Alternatively the acetylide is purged with HCCH at 100-125o to remove diluent. NaC2H adsorbs 2.2x, 2.0x and 1.6x its wt of xylene, butyl ether and dioxane, respectively. Powdered NaC2H is yellow or yellow-gray in colour and is relatively stable. It can be heated to ca 300o in the absence of air. Although no explosion or evolution of gas occurs, it turns brown due to disproportionation. At 170-190o in air it ignites slowly and burns smoothly. At 215-235o in air it “flash-ignites” and burns quickly. It can be dropped into a slight excess of H2O without flashing or burning, but vigorous evolution of HC CH (HIGHLY FLAMMABLE IN AIR) occurs. The sample had been stored in the absence of air for one year without deterioration. Due to the high flammability of HCCH, the salt should be stored dry and should be treated with care. After long storage, NaCCH can be redissolved in liquid NH3 and used for the same purposes as the fresh material. However it may be slightly turbid due to the presence of moisture. [Rutledge J Org Chem 22 649 1957, Greenlee & Henne J Am Chem Soc 77 5013 1955, Campbell & Campbell Inorg Synth II 76, 81 1946, Org Synth 30 15 1950, Beilstein 1 H 238.] It is available commercially under N2 in Sure/Seal bottles as an 18 wt% solution in xylene/mineral oil. See “Aliphatic Compounds”, Chapter 4, for its prepartion.

Properties of SODIUM ACETYLIDE

Boiling point: -22.2°C
Density  0,865 g/cm3
Flash point: 85 °F
storage temp.  Refrigerator (+4°C) + Flammables area
form  Low Melting Solid or Crystalline Powder
color  White to pale yellow
Water Solubility  Reacts with water.
Sensitive  Air & Moisture Sensitive
BRN  3587232
CAS DataBase Reference 1066-26-8(CAS DataBase Reference)
EPA Substance Registry System Sodium acetylide (1066-26-8)

Safety information for SODIUM ACETYLIDE

Signal word Danger
Pictogram(s)
ghs
Flame
Flammables
GHS02
ghs
Corrosion
Corrosives
GHS05
ghs
Exclamation Mark
Irritant
GHS07
ghs
Health Hazard
GHS08
GHS Hazard Statements H226:Flammable liquids
H261:Substances And Mixtures Which, In Contact With Water,Emit Flammable Gases
H304:Aspiration hazard
H314:Skin corrosion/irritation
H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
H373:Specific target organ toxicity, repeated exposure
H412:Hazardous to the aquatic environment, long-term hazard
Precautionary Statement Codes P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P231+P232:Handle under inert gas. Protect from moisture.
P301+P330+P331:IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Computed Descriptors for SODIUM ACETYLIDE

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