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MERCURIC THIOCYANATE

Product Name
MERCURIC THIOCYANATE
CAS No.
592-85-8
Chemical Name
MERCURIC THIOCYANATE
Synonyms
MERCURY(II) THIOCYANATE;MERCURY RHODANIDE;mercurythiocyanate;Mercury(II) thiocyan;MERCURY SULFOCYANIDE;MERCURIC THIOCYANATE;mercuricsulfocyanide;mercurydithiocyanate;Mercury sulfocyanate;MERCURIC SULFOCYANATE
CBNumber
CB0111438
Molecular Formula
C2HgN2S2
Formula Weight
316.75
MOL File
592-85-8.mol
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MERCURIC THIOCYANATE Property

Melting point:
165 °C (dec.) (lit.)
Density 
3.71 g/mL at 25 °C (lit.)
Flash point:
120 °C
storage temp. 
Store at RT.
solubility 
Methanol (Slightly)
form 
Powder
color 
White to pale yellow
Water Solubility 
Soluble in dilute hydrochloric acid, potassium cyanide and ammonia. Slightly soluble in alcohol and ether. Insoluble in water.
Sensitive 
Hygroscopic
Merck 
14,5890
BRN 
3561344
Stability:
Stable. Incompatible with strong acids. May be light or moisture sensitive.
CAS DataBase Reference
592-85-8(CAS DataBase Reference)
EPA Substance Registry System
Mercuric thiocyanate (592-85-8)
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Safety

Hazard Codes 
T+,N,Xn
Risk Statements 
26/27/28-32-33-50/53-20/21/22
Safety Statements 
13-28-45-60-61-46-36/37
RIDADR 
UN 1646 6.1/PG 2
WGK Germany 
3
RTECS 
XL1550000
8
TSCA 
Yes
HazardClass 
6.1
PackingGroup 
II
HS Code 
28521000
Hazardous Substances Data
592-85-8(Hazardous Substances Data)
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H373May cause damage to organs through prolonged or repeated exposure

H410Very toxic to aquatic life with long lasting effects

Precautionary statements

P262Do not get in eyes, on skin, or on clothing.

P273Avoid release to the environment.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P314Get medical advice/attention if you feel unwell.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
83374
Product name
Mercury(II) thiocyanate
Purity
purum p.a., ≥97.0% (precipitation titration)
Packaging
5g
Price
$69.5
Updated
2024/03/01
Sigma-Aldrich
Product number
1.04484
Product name
Mercury(II) thiocyanate
Purity
for analysis EMSURE? Reag. Ph Eur
Packaging
25G
Price
$189
Updated
2024/03/01
Sigma-Aldrich
Product number
1.04484
Product name
Mercury(II) thiocyanate
Purity
for analysis EMSURE? Reag. Ph Eur
Packaging
100G
Price
$311
Updated
2024/03/01
Sigma-Aldrich
Product number
83374
Product name
Mercury(II) thiocyanate
Purity
purum p.a., ≥97.0% (precipitation titration)
Packaging
500g
Price
$2130
Updated
2023/06/20
Alfa Aesar
Product number
037106
Product name
Mercury(II) thiocyanate
Packaging
50g
Price
$79.8
Updated
2023/06/20
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MERCURIC THIOCYANATE Chemical Properties,Usage,Production

Description

Mercury thiocyanate is a white, odorless powder. Molecular weight= 316.79; Freezing/Melting point=about 165℃ (decomposes). Slightly soluble in cold water.

Chemical Properties

Mercuric thiocyanate is an inorganic chemical substance. It is a stable solid at room temperature, and depending upon the purity, it appears as odourless white crystalline powder or grey. It is insoluble in water and denser than water and sinks in water. The solubility in alcohol and boiling H2O and in KSCN solution is higher, in ether lower. Decomposes with swelling on heating to 165°C. On decomposition, mercuric thiocyanate releases hazardous substances such as cyanide vapours, vapours of mercury, oxides of nitrogen (NO, NO2), and oxides of sulphur (SO2, SO3). Mercury thiocyanate has limited uses in chemical synthesis.

Chemical Properties

Mercury thiocyanate is a white, odorless powder.

Uses

For Pharaoh's serpents (fireworks); intensifier in photography.

Uses

Mercury(II) thiocyanate is used as a precursor to potassium tris(thiocyanato)mercurate(II) and cesium tris(thiocyanato)mercurate(II). It is also used in the determination of chloride ions in water by UV-visible spectroscopy. Further, it acts as a catalyst for the addition of thiocyanic acid to alkynes.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

MERCURIC THIOCYANATE decomposes into its elements at about 165°C. Burns readily in air to generate a coil of cohesive ash resembling a serpent (hence used in a firework: Pharaoh's serpents). Swells up to many times its original volume if heated [USCG, 1999]. Soluble in dilute hydrochloric acid [Merck]. Incompatible with strong oxidizing agents.

Hazard

Highly toxic by ingestion, inhalation, and skin absorption.

Health Hazard

Mercuric thiocyanate causes severe eye and skin irritation with possible burns and causes digestive and respiratory tract irritation with possible burns. It may impair fertility, may cause harm to the unborn child, is harmful if inhaled, may cause allergic skin reaction, may cause kidney damage, may cause CNS effects, is light sensitive, and is a severe marine pollutant. Contact with acids liberates very toxic gas. The target organs include kidneys, CNS, reproductive system, eyes, and skin.

Safety Profile

A poison by ingestion and intraperitoneal routes. Moderately toxic by skin contact. Thermally unstable and decomposition may be vigorous. When heated to decomposition it emits very toxic fumes of Hg, NOx, SOx, and CN-. See also MERCURY COMPOUNDS and CYANATES.

Synthesis

A Hg(NO3)2 solution, acidified with a few drops of HNO3, is treated with the stoichiometric amount of KSCN solution. The resultant crystalline precipitate is suction-filtered and washed with H2O. The product may be recrystallized from hot H2O or alcohol. Yield 80%.
Hg(NO3)2 + 2 KSCN = Hg(SCN)2 + 2KNO3

Potential Exposure

Mercury thiocyanate is used in photography and fireworks.

First aid

If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit. Antidotes and special procedures for medical personnel: The drug NAP (n-acetyl penicillamine) has been used to treat mercury poisoning, with mixed success. Note to physician: For severe poisoning BAL [British AntiLewisite, dimercaprol, dithiopropanol (C3H8OS2)] has been used to treat toxic symptoms of certain heavy metals poisoning including mercury. Although BAL is reported to have a large margin of safety, caution must be exercised, because toxic effects may be caused by excessive dosage. Most can be prevented by premedication with 1-ephedrine sulfate (CAS: 134-72-5).

storage

Color Code—Blue: Health Hazard/Poison: Store in a secure poison location. Prior to working with this chemical you should be trained on its proper handling and storage. Store in tightly closed containers in a cool, wellventilated area away from light, heat, and acids, including fumes.

Shipping

UN1646 Mercury thiocyanate, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.

Purification Methods

Recrystallise it from H2O, and it can give various crystal forms depending on conditions. Its solubility in H2O is 0.069% at 25o, but is more soluble at higher temperatures. It decomposes to Hg above 165o. Poisonous. [Mason & Forgeng J Phys Chem 35 1121 1931, Birckenbach & Kolb Chem Ber 68 919 1935.]

Incompatibilities

Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. Mercury thiocyanate is sensitive to heat; expands to many times its original volume and then decomposes at freezing/melting point forming toxic fumes of sulfur oxides, mercury cyanide, and nitrogen oxides. Contact with acid or acid fumes causes release of toxic mercury and cyanide vapors. Incompatible with chlorine, reducing agents such as hydrides, sulfides

Waste Disposal

Small amounts may be destroyed by alkaline hydrolysis. Admixture with alkali can be followed by soil burial. Larger quantities can be disposed of by incineration in admixture with acetone or xylene and using effluent gas scrubbing. Do not reuse empty container; proper disposal required.

MERCURIC THIOCYANATE Preparation Products And Raw materials

Raw materials

Preparation Products

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MERCURIC THIOCYANATE Suppliers

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