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Per-kilogram prices of some synthetic radioisotopes range to trillions of dollars. ... ( mg / kg ) Price [7] Year Source Notes USD/kg USD/L [c] 1: H: Hydrogen ...
Both steam cracking and production from natural gas via ethane are estimated to emit 1.8 to 2kg of CO2 per kg ethylene produced, [55] totalling over 260 million tonnes a year. [56] This is more than all other manufactured chemicals except cement and ammonia. [57]
Commodity chemicals (or bulk commodities or bulk chemicals) are a group of chemicals that are made on a very large scale to satisfy global markets.The average prices of commodity chemicals are regularly published in the chemical trade magazines and web sites such as Chemical Week and ICIS.
Polymerization of ethylene to polyethylene is described by the following chemical equation: n CH 2 =CH 2 (gas) → [−CH 2 −CH 2 −] n (solid) ΔH/n = −25.71 ± 0.59 kcal/mol (−107.6 ± 2.5 kJ/mol) [23] Ethylene is a stable molecule that polymerizes only upon contact with catalysts. The conversion is highly exothermic.
PetroChina's (PTR) ethane-to-ethylene project will likely generate 600,000 tons of ethylene annually, 300,000 tons of high-density polyethylene and 300,000 tons of full-density polyethylene.
Along the way, the molecular weights increase from about 10 2 up to 10 4 and the unit prices from about $100 up to $10 5 per kilogram. However, only a small part of the total amino acid production is used for peptide synthesis.
While prolonged low doses of ethylene glycol show no toxicity, at near lethal doses (≥ 1000 mg/kg per day) ethylene glycol acts as a teratogen. "Based on a rather extensive database, it induces skeletal variations and malformations in rats and mice by all routes of exposure." [40]
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