Some UK vendor info-
P21-S Wheel Cleaner (Felgen-Reiniger)
(Red) Power Gel – manufacturers approved way to remove corrosive brake dust and road grime from alloy wheels. Safe, pH controlled, formula is guaranteed not to harm any type of road wheel, braking system or other automotive surface, works safely and effectively on every type of wheel and coating, removes brake pad adhesive and sequestered metal brake dust safely -
Classic car, kit car and motorcycle restoration tools and equipment - Frost Auto Restoration Techniques
MSDS -
http://www.frost.co.uk/images/health...and-safety.pdf