My desktop computer system employs a liquid cooling loop featuring a 6-litre external reservoir and radiator combination "cooling tower" unit. It isn't a cooling tower in the strict sense as it does not achieve temperature reduction through any evaporative method - only by radiating heat through the metal structure. However, the reservoir is not sealed and I have noticed a reduction in the level of liquid over the past few months since I started using it - I must assume that I'm breathing-in this liquid in some amount.
XSPC EC6 is a high performance, eco-friendly coolant for PC water-cooling. It’s based on a blend of refined vegetable extracts with non-toxic corrosion inhibitors and non-toxic dyes. It offers superb protection for copper, brass, steel, nickel, aluminium and has been tested with a range of acetal and acrylic plastics
Never one to trust marketing materials, I requested a material safety data sheet from the manufacturers, and details of the ingredients. I only received an MSDS back without an ingredients listing. The MSDS reports the following:
COMPOSITION / INFORMATION ON PRODUCT COMPONENTS
Hazardous Components for EC
Low oral toxicity proprietary antifreeze formulation based on refined vegetable extracts and non-toxic corrosion and scale inhibitors. Classified as GRAS (Generally Regarded as Safe) as a food additive and not classified as harmful for handling or transport purposes. However we recommend good working practices are employed and personal protection gear is worn when handling any chemical.
EXPOSURE CONTROL/PERSONAL PROTECTION
Respiratory Protection: Respiratory protection if there is a risk of exposure to high vapour concentrations.
Acute Toxicity: LD 50/oral/rat: >20000 mg/kg
Mobility: The product will dissolve rapidly in water. Ecotoxicity: The product is rated as:
Algae EC50 (72h):>100mg/l.
Fish : LC50 (96h):.100mg/l, Oncorhynchus mykiss
Bacteria: >1000 mg/l Daphnids (acute) EC50 (48h):>100mg/l
My guess is that it's some glycol-based solution - I'm disappointed they don't reveal the actual ingredients.
Is this substance anything I should be concerned about? Is there any carcinogenic potential?
Also, how can I determine the specific heat capacity of the coolant? As it is used in a reservoir system instead of an active heat-exchange system the heat-capacity is important - I would like to be able to calculate exactly what TDP (Thermal Design Power) computer components I can use and how long I can run them for at-load without fear of overloading the cooling system.