Belcor® 575 corrosion inhibitor

General Product Information
Belcor 575 has been developed as an all organic corrosion inhibitor for mild steel in industrial water systems.

The active ingredient of Belcor 575 is hydroxyphosphonoacetic acid. The CAS number is 23783-26-8.

Typical physical properties
appearance		dark brown liquid
odour		slight
active ingredient content		approx. 50%
specific gravity		1.32-1.42
pH (undiluted)		<1
pH (1% solution)		approx. 1.5
boiling point range		101-103°C (214-217°F)
freezing point range		-5°C (22°F)
solubility in      water      ethylene glycol      methanol      50% caustic soda		miscible miscible miscible miscible

Chemical reactivity/compatibility
Belcor 575 is slowly oxidised by free residual halogen and is readily oxidised by strong oxidising agents. In the presence of free halogen, Belcor 575 may partially revert to orthophosphate, but field experience has shown that it can be used effectively in halogenated systems. Further details are available on request.

Thermal stability
Differential scanning calorimetry has shown that Belcor 575 is stable up to temperatures of 160°C (320°F).

Logistics
packaging		HDPE 220L XL-ring Mauser drum height 935 mm diameter 580 mm gross wt 258.5 kg net wt 250.0 kg
classification		irritant for supply corrosive for conveyance IATA class 8 UN No 1760 IMCO class 8 UN No 1760

Regulatory approvals
USDA (USA)		G5: cooling and retort water
		G7: boilers, steamlines, cooling systems - no food contact

Toxicology data
acute oral LD50 (rats)		2766 mg/kg
eye irritation		Belcor 575 will cause severe damage.The neutralised product is non irritant.
skin irritation		it is assumed to be corrosive owing to its acidic nature
skin sensitising potential		it is a strong skin sensitiser based on its active ingredient
toxicity to fish
96-hr LC50 (rainbow trout)		380 mg/l
96-hr LC0 (rainbow trout)		200 mg/l
96-hr LC50 (zebra fish)		1640 mg/l

Ecological data
24-hr EC50 (daphnia)		140 mg/l
IC50 (sludge inhibition)		>100 mg/l
COD		200 mg O2/g
biodegradability		75% in 28 days

Further details on safety and handling are available in the materials safety data sheet on this product.

Patents
FMC owns or is the licensee of patents and patent applications which may cover the products and/or uses described in this brochure.

Process Additives Division