Date: 21..02.22
COSHH Assessment
Review Date: 21.02.22
Substance used:
Ammonium Sulphide 20% in aqueous solution GPR RECTAPU
Manufacturer:
VNR Chemicals
Description of product:
Yellow colour, viscous
Emergency telephone number
01270502894 (Carechem 24) 01865 407333 (Anti Poison Centre Emergency No-24 Hours).
Location of process
Various
Activity being carried out?
Colouring/patinaton of bronze
Identify the persons at risk: Describe the activity or work process. (Include how long and how often this is carried out and the quantity of substance used.
Employees Contractors Public x (including trainees) x The diluted acid is further diluted with parts water, 20% chemical 80% water. It is then applied to a bronze casting, with a pump spray bottle or brush. The casting is heated with a gas torch during this process. …… is used during this process.
Classification under CHIP/CLP
Corrosive
Environment Hazard
Hazard Type Gas
Vapour
Explosive
Mist
Route of Exposure Inhalation
Flammable
Long Term Hazard
Fume
Absorption
Harmful/ irritant
Dust
Oxidising
Liquid
Ingestion
Toxic
Pressurised Container
Solid
Other
Injection
Workplace Exposure Limits (WELs) please indicate n/a where not applicable Does not contain substances above concentration limits fixing an occupational exposure limit. Long-term exposure level (8hrTWA): 5mg/m3 n/a
Short-term exposure level (15 mins): 10mg/m3 n/a
Risks to Health from Identified Hazards Control Measures: (for example extraction, ventilation, training, supervision). Take account of those substances that are produced from activities undertaken by another employer’s employees.
Control parameters Does not contain substances above concentration limits fixing an occupational exposure limit.
Exposure controls Appropriate engineering controls Technical measures and the application of suitable work processes have priority over personal protection equipment. If handled uncovered, arrangements with local exhaust ventilation have to be used. Personal protection equipment Wear suitable protective clothing. When handling with chemical substances, protective clothing with CE-labels including the four control digits must be worn.