Silver sulfate Property

Melting point:

652 °C (lit.)

Boiling point:

1085 °C

Density 

5.45

Flash point:

1085°C

storage temp. 

Keep in dark place,Sealed in dry,Room Temperature

solubility 

8g/l

form 

Solid

Specific Gravity

5.45

color 

White to off-white

PH

5-6 (5g/l, H2O, 25℃)

Water Solubility 

7.4 g/L (20 ºC)

Sensitive 

Light Sensitive

Merck 

14,8529

Solubility Product Constant (Ksp)

pKsp: 4.92

Exposure limits

ACGIH: TWA 0.01 mg/m3
NIOSH: IDLH 10 mg/m3; TWA 0.01 mg/m3

Stability:

Stability Stable, but light-sensitive.

InChIKey

YPNVIBVEFVRZPJ-UHFFFAOYSA-L

CAS DataBase Reference

10294-26-5(CAS DataBase Reference)

EPA Substance Registry System

Silver sulfate (10294-26-5)

Safety

Hazard Codes 

Xi,C,N

Risk Statements 

36/37/38-36-35-50/53-41

Safety Statements 

26-36-39-45-36/37/39-30-61-60

RIDADR 

UN 1830 8/PG 2

WGK Germany 

3

F 

8

TSCA 

Yes

HazardClass 

9

HS Code 

28432900

Toxicity

LD50 orally in Rabbit: 5000 mg/kg

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H318Causes serious eye damage

H410Very toxic to aquatic life with long lasting effects

Precautionary statements

P273Avoid release to the environment.

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

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P391Collect spillage. Hazardous to the aquatic environment

P501Dispose of contents/container to..…

Silver sulfate Chemical Properties,Usage,Production

Chemical Properties

Small crystals or powder, colorless and shiny. Contains approximately 69% silver and turns gray when exposed to light. Melts at 652°C and decomposes at 1,085°C. Partially dissolves in water and completely dissolves in solutions containing ammonium hydroxide, nitric acid, sulfuric acid, and hot water. Does not dissolve in alcohol. Its solubility in pure water is low, but it increases when the pH of the solution decreases. When the concentration of H+ ions is high enough, it can dissolve significantly.

Uses

Silver sulfate is used as a catalyst to oxidize long chain aliphatic hydrocarbons in the determination of chemical oxygen demand (COD). It serves as a catalyst in wastewater treatment and aids in the production of nanostructured metallic layers beneath Langmuir monolayers.

Application

Silver sulfate may be employed in the following studies:
Iodination reagent in combination with iodine for the synthesis of iododerivatives.
Synthesis of iodinated uredines.

Preparation

Silver sulfate is precipitated by adding sulfuric acid to a solution of silvernitrate:2Ag+(aq) + SO42- (aq) → Ag2SO4 (s) The precipitate is washed with hot water and preparation is under ruby red illumination.

General Description

Silver sulfate is an odorless white to gray solid. Sinks and mixes with water. (USCG, 1999)

Reactivity Profile

Silver sulfate has weak oxidizing or reducing powers. Redox reactions can however still occur. The majority of compounds in this class are slightly soluble or insoluble in water. If soluble in water, then the solutions are usually neither strongly acidic nor strongly basic. These compounds are not water-reactive.

Hazard

Highly toxic.

Health Hazard

Contact with eyes causes irritation. If continued for a long period, ingestion or inhalation of silver compounds can cause permanent discoloration of the skin (argyria).

Purification Methods

Crystallise the sulfate form hot conc H2SO4 containing a trace of HNO3, and dilute with H2O while being strongly cooled. The precipitate is filtered off, washed with H2O and dried at 120o. Its solubility in H2O is 0.8% at 17o, and 1.46% at 100o. Store it in the dark. [Glemser & Sauer in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol II p 1042 1965.]