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After two days, the treated leather was polished with a soft cloth. Hard leathers can be soaked in a solution of one part British Museum leather dressing: three parts Stoddard solvent. [4] British Museum leather dressing darkens leather, but it is a treatment with a good success record. [3] [4]
Stoddard solvent is a specific mixture of hydrocarbons, typically over 65% C 10 or higher hydrocarbons, [4] developed in 1924 by Atlanta dry cleaner W. J. Stoddard and Lloyd E. Jackson of the Mellon Institute of Industrial Research as a less flammable petroleum-based dry cleaning solvent than the petroleum solvents then in use.
25.5 mg/m 3: 5 ppm: 7803523: 8052-41-3: 0361: Stoddard solvent: 20 000 mg/m 3-8052413: 57-24-9: 0197: Strychnine: 3 mg/m 3-57249: 100-42-5: 0073: Styrene: 2982 mg/m 3: 700 ppm: 100425: 7446-09-5: 0074: Sulfur dioxide: 262 mg/m 3: 100 ppm: 7446095: 7664-93-9: 0362: Sulfuric acid: 15 mg/m 3-7664939: 10025-67-9: 0958: Sulfur monochloride: 27.6 mg ...
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In the United Kingdom, the environmental regulator permits only chemical additives which are classed as non hazardous to groundwater for fracturing fluids. [3] [4] [5] Operators are required to disclose the content of hydraulic fracturing fluids to the relevant environment agency [6] while the composition must be disclosed if the regulator demands it. [7]
At least 35 children were killed and six others critically injured in a crowd crush at a funfair in the Nigerian city of Ibadan on Wednesday, police said.
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