Hi Group
The UK Approach for Evaluating the Human Health Risks from Petroleum Hydrocarbons in Soils EA, 2005 gives the most common guidance for risk assessment of the C10 - C20 aliphatics from petroleum derived products for environmental reasons. The limits shown suggests a risk if 0.1mg per kilogram body weight per day is likely to be exceeded by topical application or ingestion. These products easily pass through the skin and into the blood, which is why they are the vehicle of choice for dermal absorbtion of various pharmaceutical compounds, so both routes are relevant.
However, a lot of face creams, body lotions, lipsticks and other cosmetics contain these compounds. Vaseline is 100% petroleum derived containing between 5 and 10% of compounds in this group. E45 creams and lotions are predominantly soft paraffin and petroleum products.
Using these products is likely to cause an average 70 Kg person to daily apply around 250 mg of these C10 - C20 aliphatics to their skin, well above the equivalent environmental limit for a 70 kg person of 7 mg
It is interesting how 2 different industries have developed such widely different views about toxicity. I do not recall seeing large warning signs on Vaseline or E45 cream stating you must never use more than a pea sized blob per day. In fact these products are recommended for use on babies.
The only consistency we see is inconsistency. Discuss
Genuine toxicity comes from mono aromatics, polyaromatics, alkyl polyaromatics and sulphur and nitrogen containing aromatics. As an industry, we should be looking at these compounds in more detail. In a lot of cases, the alkyl PAH is more toxic than the parent PAH we exclusively look for and is usually present in much higher concentrations. It is impossible to have a genuine scientifically defensible risk model without this data
Regards
Colin
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