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Lithium perchlorate

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Lithium perchlorate Basic information

Product Name:
Lithium perchlorate
CAS:
7791-03-9
MF:
ClLiO4
MW:
106.39
EINECS:
232-237-2
Mol File:
7791-03-9.mol
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Lithium perchlorate Chemical Properties

Melting point:
236 °C(lit.)
Boiling point:
430°C
Density 
1.13 g/mL at 20 °C
Flash point:
400°C
solubility 
H2O: 1 M at 20 °C, clear, colorless
form 
powder
color 
White
Specific Gravity
2.43
PH
6.0-7.5 (25℃, 5%)
PH Range
6.0 - 7.5
Water Solubility 
600 g/L (25 ºC)
Sensitive 
Hygroscopic
Merck 
14,5539
Stability:
Strong oxidizer - contact with combustible material may cause fire. Incompatible with organic materials, combustible materials, strong reducing agents.
CAS DataBase Reference
7791-03-9(CAS DataBase Reference)
NIST Chemistry Reference
Lithium perchlorate(7791-03-9)
EPA Substance Registry System
Perchloric acid, lithium salt (7791-03-9)
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Safety Information

Hazard Codes 
O,Xi,Xn,F
Risk Statements 
8-36/37/38-9-20/22-11-67
Safety Statements 
17-26-36-37/39-36/37/39-16
RIDADR 
UN 1993 3/PG 1
WGK Germany 
1
3
TSCA 
Yes
HazardClass 
5.1
PackingGroup 
II
HS Code 
28299000

MSDS

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Lithium perchlorate Usage And Synthesis

Chemical Properties

White crystalline powder

Uses

Used as an oxidizing agent.

Uses

Oxidizing agent.

Uses

The big advantage of lithium perchlorate is its high density and oxygen availability for combustion. A quite interesting methodology involves the use of lithium perchlorate anhydrides complexes in the acylation of activated aromatic compounds.Lithium perchlorate is frequently utilized as promoter to accelerate the acylation process and to increase the yield in the reaction catalyzed by metal triflates.However, lithium perchlorate itself can act as a very efficient catalyst in the acylation of variously substituted methoxy? and methylbenzenes with AAN affording the aryl ketones in 65%–99% yield. The exceptional activation is ascribed to the formation of a complex with a strong electrophilic character between lithium perchlorate and AAN in neat AAN. The observed para?regioselectivity can be interpreted in terms of the high steric requirement of the lithium perchlorate– AAN complex. A further important feature of this process is the possibility of quantitatively recovering and reusing the catalyst after activation. It must be underlined, however, that lithium perchlorate is an oxidizing compound and can undergo devastating explosions; consequently, it must be handled with maximum care.

Battery Materials

Lithium perchlorate (LiClO4) is sufficiently soluble (beyond 1Min organic solvents, e.g., EC/DMC) and forms electrolyte solutions with good conductivity (about 9 mS·cm?1 in EC/DMC at ambient temperature). In organic solvents LiClO4 forms thicker solid electrolyte interface (SEI) layers than LiPF6 or LiBF4, but they are less resistive. This fact is attributed to the highly resistive LiF on the surface which is formed by hydrogen fluoride (HF) generated by hydrolysis of fluorine-containing anions, for example, LiBF4 and LiPF6, with traces of moisture and the existing SEI layer [62, 63]. Furthermore, it has a high anodic stability of up to 5.1 V on LiMn2O4 in EC/DMC and is less hygroscopic than LiPF6. Despite its many advantages, the high oxidation state of chlorine (VII) in ClO4 ? results in problems. LiClO4 solutions are thermally unstable and show explosion risks, especially in ethers.

Purification Methods

Crystallise it from water or 50% aqueous MeOH. It is rendered anhydrous by heating the trihydrate at 170-180o in an air oven. It can then be recrystallised twice from acetonitrile and again dried under vacuum [Mohammad & Kosower J Am Chem Soc 93 2713 1971]. SKIN IRRITANT.

Lithium perchlorate Preparation Products And Raw materials

Raw materials

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