Archives November 2, 2020

FACT SHEET

Heptane, All Isomers

CAS Numbers: n-Heptane: 142-82-5;

Other 8 Isomers

What is heptane?

Heptane is a colorless, volatile, flammable organic liquid with a faint hydrocarbon odor. Heptane is a component of natural gas and crude oil (0.1-1.9%). All isomers of heptane are used as solvents for glues, lacquers and inks, as industrial solvent for extracting natural gas, in organic synthesis, as an anesthetic, and are ingredients of gasoline and petroleum solvents.

How is heptane released into ambient air?

Heptane can be released into the air from its production and use in many products associated with the petroleum and natural gas industries. In addition, the combustion of gasoline is a major mechanism for the release of heptane into the atmosphere. Heptane released to the environment is expected to volatilize to the atmosphere, where it will undergo photochemical oxidation reactions.

How can heptane affect my health?

Heptane has a low order of acute or chronic toxicity. Permitted levels of heptane should not cause adverse health and welfare effects. Inhalation of high concentrations of heptane can cause depression of the central nervous system, mucous membrane and sensory irritation, and neurobehavioral impairment. There are no studies indicating heptane has a potential to be a human carcinogen.

Is heptane odorous or harmful to plants?

Heptane has a gasoline-like odor at moderate levels. Heptane has not been shown to have an adverse effect on plants.

Why does the TCEQ set regulatory guidelines for heptane?

The TCEQ has set various air quality guideline levels (ESLs, AMCVs and ReVs) to protect human health and welfare. Please refer to Definitions of ESLs, ReVs, and AMCVs located on the TCEQ DSD webpage for more information. The air quality guideline levels for heptane have been designed to protect the general public from short-term and long-term adverse health and welfare effects. The general public includes sensitive populations such as children, the elderly, pregnant women and people with preexisting health conditions. If you would like to know more about the specific ESLs, AMCVs and ReVs developed, what the values are and what they are used for, please see the DSD.

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Monthly analysis of Asian base oil in October, 2020

At the beginning of the month, due to the week-long holiday in most of Northeast Asia (China, Taiwan and South Korea), market negotiations were light. Due to the turnover of a South Korean factory, Northeast Asia class II oil products will continue to be limited in October. Another Taiwan refinery has just resumed production since August shutdown for maintenance. In the Indian market, buyers are cautious about South Korea’s supply quotation, but buyers in urgent need will continue to book from limited suppliers and ensure the quantity. Due to the long holidays in North Asia, including China, Taiwan and South Korea, the FOB and CFR prices of class I base oil are stable and the trade is light. The spot shortage of class I base oil in Japan and Southeast Asia continued, while the purchase intention was low due to the uncertainty of global economy. The prices of 50N and 500 / 600N base oils of class I remained stable, and negotiations were rare. The spot supply of refineries in South Korea and Taiwan was limited in October. Due to the shortage of supply from Asia, the Middle East and the United States, as well as the shortage of domestic supply due to the influence of a local Indian refinery, buyers tend to accept the price of base oil with price increase to maintain stability, while the negotiation on South Korea’s supply is cold. At the end of the month, due to the continuous shortage of supply due to the round inspection and production reduction of class 1 base oil refineries in Japan and Southeast Asia, the FOB price of class I base oil in Asia was stable and firm, The negotiation on goods to Southeast Asia and India went up. Due to the relatively optimistic market outside China, especially in Southeast Asia and India, the prices of 150n and 500 / 600nfob base oils in Northeast Asia are stable and firm. Due to the recent decline in refinery round inspection and overall output, the spot supply of class II base oil in Taiwan and South Korea, the main production areas of Northeast Asia, is limited. In the Indian market, supply from Asia, the Middle East and the United States continued to be depressed, as buyers were forced to accept price increases due to the shortage of goods. A local refinery in India is in the process of inspection, which has once again made the supply situation worse, and the interest in buying has increased compared with the price surge a few months ago. The price of class II base oil is stable, and the negotiation on South Korea’s supply is quiet.