2016年11月28日星期一

What's the Lithium Bromide ?

What's the Lithium Bromide ?

Chemical Formula:LiBr      CAS NO:7550-35-8       MW: 86.58
Lithium bromide (LiBr) is a chemical compound of lithium and bromine. Its extreme hygroscopic character makes LiBr useful as a desiccant in certain air conditioning systems.
The liquid content is 50%; the powder content is 99% and 99.5%.
Lithium bromide.pngLithium Bromide 3D ionic
Production and properties:
LiBr is prepared by treatment of lithium carbonate with hydrobromic acid. The salt forms several crystalline hydrates, unlike the other alkali metal bromides. The anhydrous salt forms cubic crystals similar to common salt (sodium chloride).
Lithium hydroxide and hydrobromic acid (aqueous solution of hydrogen bromide) will precipitate lithium bromide in the presence of water.
LiOH + HBr → LiBr + H2O
Usage:
Lithium bromide is used in air-conditioning systems as desiccant.
Lithium bromide is used as a salt in absorption chilling along with water (mainly for the the machine of cooling system). Otherwise the salt is useful as a reagent in organic synthesis. For example, it reversibly forms adducts with some pharmaceuticals.
Medical applications:
Lithium bromide was used as a sedative, beginning in the early 1900s, but it fell into disfavor in the 1940s when some heart patients died after using it as a salt substitute.
Like lithium carbonate and lithium chloride, it was used as treatment for bipolar disorder.
Doses as low as 225 mg/day of LiBr can lead to bromism.
Hazards:
Lithium salts are psychoactive and somewhat corrosive. Heat is quickly generated when lithium bromide is dissolved into water because it has a negative enthalpy of solution.

2016年7月20日星期三

                   Industrial grade Ammonium Bromide
CHEMICAL FORMULA : NH4Br       M.W.: 97.94   EINECS No.:235-183-8
APPLICATION: Ammonium Bromide is used in the preparation of photographic emulsions and developers,in pharmaceutical preparations,as a wood preservative,forwater treatment and as a flame retardant additive.
CAS#12124-97-9  HS NO.28275900 Packing:In 25kg net plastic woven bags lined with plastic bags.
  
 NameAmmonium Bromide 

Manufacture: Twin International Co., Limited

  Quantity20T

PackageIn 25kg net plastic woven bags.
         Item                      Specification                 Test Results

1 Appearance                White Crystal                    OK
2 Assay %:         99                    99.72      
3Chlorides (as Cl)%:    0.6    0.04                          
4Bromates(as BrO3)%           0.003                     < 0.003
5Sulphate(as SO4)%     0.05               <0.01 
6PH             4.55.5                    4.94
7Lead (as Pb)PPM     10                  < 5
8Arsenic (as As) PPM   4                        < 4
9Moisture %        0.5                0.19        
  
 Comments: confirm to the standard

Remarks: we may make special specification according to customers’ requirements.


2016年2月2日星期二

sodium monofluorophosphate as fluoride toothpaste additives SMFP

CHEMICAL FORMULA:Na2PO3F
M.W.: 143.95
DESCRIPTION:small achromaticity crystal or white powder. Decompose in wet air. Dissolve in water.
Function: used to protect the teeth of therapeutic source of fluoride toothpaste is toothpaste abrasives, anti-caries agents and desensitizing agents, the general amount of 0.8%, but also for drinking water fluoride and metal surface cleaner fungicides It is also preparing other single fluoride phosphate raw materials.
CAS#:10163-15-2     HS NO.:2835299000  Packing:25kg/bag
Retention Period

2 years
SPECIFICATION
TOOTHPASTE GRADE
Result
ITEMS
USP-32
Standard
Assay(Na2PO3F)             %
91.7-100.5%
98%
Coalescent fluorin              %
/
/
dissociate fluorin               %
≤1.2%
0.4%
assemble fluorin               %
/
/
arseni                      %
≤0.0003 %
0.0003%
PH value (20g/Lsolution)
6.5-8.0
6.9
Loss on drying               %
≤0.2%
0.2%
volatilization                  %
Eligible
Eligible
Insoluble residues
Pass
Pass
Heavy metal (Pb)              %
≤0.005%
0.005%
  Fluorin             %
≤1.2%
0.5%
Remark:We may make special specification according to customers requires.