7789-40-4 Usage
Description
Thallium bromide is a yellow-white solid and hygroscopic. It is similar to silver bromide.
It gets darker when light shines on it. It is very toxic, like all thallium compounds. It does
not dissolve in water. Thallium bromide is used in gamma ray and x-ray detectors and
also in semiconductors. Prolonged period of exposure to thallium compounds has been
reported to cause adverse health effects such as joint pain, severe pain in legs, loss of appetite,
fatigue, and albuminuria.
Chemical Properties
THALLIUM(I) BROMIDE is yellow crystalline powder
Uses
Different sources of media describe the Uses of 7789-40-4 differently. You can refer to the following data:
1. THALLIUM(I) BROMIDE is used for mixed crystals with thallium iodide for infrared radiation transmitters used in military detection devices.
2. Thallium(I) bromide is used as Chemical reagents and pharmaceutical intermediates.
Safety Profile
Poison by ingestion and subcutaneous routes. Reacts violently with Na, K. When heated to decomposition it emits very toxic fumes of Brand T1. See also BROMIDES and THALLIUM COMPOUNDS.
Purification Methods
Thallous bromide (20g) is purified by refluxing for 2-3hours with water (200mL) containing 3mL of 47% HBr. It is then washed until acid-free, heated to 300o for 2-3hours and stored in brown bottles. It solubility in H2O (w/w) is 0.034% at 0o, 0.048% at 20o, and 0.204% at 100o. [D.nges in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 870 1963]. POISONOUS.
Check Digit Verification of cas no
The CAS Registry Mumber 7789-40-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,8 and 9 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 7789-40:
(6*7)+(5*7)+(4*8)+(3*9)+(2*4)+(1*0)=144
144 % 10 = 4
So 7789-40-4 is a valid CAS Registry Number.
InChI:InChI=1/BrH.Tl/h1H;/q;+1/p-1
7789-40-4Relevant articles and documents
Chiral reaction products produced from mesogenic molecular structural elements and bifunctionally reactive tartaric acid derivatives, and their use as dopants in liquid crystal phases
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, (2008/06/13)
The new compounds produced from a molecular structural element with two chirality centers and at least one mesogenic structural element are defined by the general formula (I) STR1 in which the symbols have the following meaning: Y1 =H, (C1 -C10)alkyl, MC--CH2 or MC--CO, MC denoting the molecular radical of a mesogenic carboxylic acid after splitting off a COOH group, Y2 =(C1 -C10)alkyl, MC--CH2 or MC--CO, it being possible for Y1 and Y2 to jointly represent a MC--CH group, which is then part of a dioxolane ring, X=COOR1, CONH2, CONR2 R3 or C N, R1 =(C1 -C10)alkyl or MC--CH2, and R2, R3 =H and (C1 -C4)alkyl or, independently of each other, (C1 -C4)alkyl. Said esters preferably find application as dopants in twistable liquid crystal phases in which they produce temperature compensation and twisting.
