1. All petroleum based products are highly complex chemical mixtures. Although almost exclusively composed of @entity9436 , the composition varies with the crude oil source. 2. Their @entity137 for @entity1 is generally low but there are exceptions. Although @entity146 and sensitization to specific ingredients may be demonstrated in animals, animal experiments are not a reliable indicator of sensitization potential in @entity1 . 3. Both product complexity and commercial considerations can make acceptable and meaningful compositional disclosures difficult. A nomenclature system exists which solves these problems. 4. Frame formulations would have some value to poisons centres dealing with petroleum product enquiries. 5. As legislation for the European Union is developed, the balance must be reached between disclosure of the (often confidential) precise chemical composition of products and a practical and useful composition for the guidance of users and medical personnel. This is a key issue with some petroleum products, mainly due to the additives used in them. 6. For several reasons, such as climatic conditions or logistics of supply, the various components, including additives, used in a branded product may vary because the final product composition is determined not by chemistry but by performance in service. 7. Lubricants may contain between 10 and 20% of additives; fuels contain additives only at parts per million levels. However, for both fuels and lubricants, @entity137 from additives is rarely a matter of concern.

Composition and XXXX of petroleum products and their additives.

@entity1 :: ('9606', 'Species') :: ['man'] @entity137 :: ('MESH:D064420', 'Disease') :: ['toxicity'] @entity146 :: ('MESH:D001523', 'Disease') :: ['irritancy'] @entity9436 :: ('MESH:D006838', 'Chemical') :: ['hydrocarbons']
@entity137 :: (MESH:D064420,Disease) :: ['toxicity']
