xylene evaporation rate

The calculation uses a set of dimensionless numbers. Evaporation rate; 0.8 Approximate Upper/lower flammability or explosive limits; 1.9 to 12.3 % by volume Approximate Vapour pressure; 1.893 kPa at 38 deg C Approximate Vapour density; 3.7 (Air = 1) Relative density; 0.87 at 15.5 deg C Solubility(ies); 0.02% at 25 deg C in water Partition coefficient: n-octanol/water; Not available Give us feedback about your experience on this site, 0.86 - 0.88 @ 20 - 25 °C (68 - 77 °F) Reference substance: (Water = 1). 0000004254 00000 n 0000386079 00000 n These conversions are catalyzed by zeolites.[1]. 0000009401 00000 n , © 2020 All Rights Reserved @ REXALL LABS & CHEMICALS. x�b``�b``�����0߅A���bl,���KP��@��~MoOc�ض��li@������1�z������=�Vb ��$� ���� rX�Xr��ExH%pg�T1�ahl�n�] ��BXE���C�(��,�ʷ �ν�1�Ƃ!����W,q��a��g�صH3�� ��2n In dentistry, xylene can be used to dissolve gutta percha, a material used for endodontics (root canal treatments). [18][19], The side effects of exposure to low concentrations of xylene (< 200 ppm) are reversible and do not cause permanent damage. 0000019763 00000 n window._linkedin_data_partner_ids.push(_linkedin_partner_id); [1] As with many alkylbenzene compounds, xylenes form complexes with various halocarbons. 4 0 obj Based on the air velocity, U, the temperature T and length of the plate L, then basic parameters such as the kinematic viscosity of air, ν, diffusion coefficient of the solvent in air, D we have: The key number is Sh because it contains the mass transfer coefficient, k. It is calculated from the other two via: From k we can calculate the moles of solvent evaporated per unit width along the length L, given a molar concentration c at the surface and assuming that the air is solvent-free: The molar concentration c depends on the vapour pressure, VP, the temperature T and the universal gas constant R: The mass evaporated is simply the molar rate multiplied by the moelcular weight, Evap*MWt. I have datasheets of the two solvents, it is indicated the evaporation rate and also a reference BUOAC=1. At an exposure between 200 and 500 ppm, symptoms can include feeling "high", dizziness, weakness, irritability, vomiting, and slowed reaction time. The principal mechanism of detoxification is oxidation to methylbenzoic acid and hydroxylation to hydroxylene. Vapour density Value: 3,7 Specific gravity Value: 0,870 kg/m3 Test temperature: 20 °C Solubility description Soluble in: Organic solvents. At an exposure of 100 ppm, one may experience nausea or a headache. Evaporation of Solvents and Thinners. The density of each isomer is around 0.87 g/mL (7.26 lb/U.S. channel for more Practical Science videos, © Copyright 2020 Professor Steven Abbott | Company Registration No. 0000002414 00000 n The kinematic viscosity of air changes with temperature; a simple polynomial is used to calculate it. [10] The complexes of different isomers often have dramatically different properties from each other.[11]. I do not understand what it means, how I can compare the two solvents, and how is done this measurement. 0000259802 00000 n [14] Similarly it is a cleaning agent, e.g., for steel, silicon wafers, and integrated circuits. Not soluble in water. s.parentNode.insertBefore(b, s);})(); Martindale, David C. and Kuchar, Paul J., "Recherches sur les huiles légéres obtenues dans la distillation du bois", Production of xylenes from light aliphatic hydrocarbons via dehydrocyclodimerization and methylation, "Xylene (Mixed Isomers), Air Toxic Hazard Summary)", "Xylene: An overview of its health hazards and preventive measures", Paraxylene-Orthoxylene | Prices, News & Market Analysis, Appendix I, Painting Conservation Catalog, "Auditory neuropathy in a patient exposed to xylene: case report", "HIPPURIC and METHYL HIPPURIC ACIDS in urine", "Measurement by gas chromatography of urinary hippuric acid and methylhippuric acid as indices of toluene and xylene exposure", https://en.wikipedia.org/w/index.php?title=Xylene&oldid=981120617, Wikipedia articles needing clarification from June 2016, Wikipedia articles incorporating a citation from the 1911 Encyclopaedia Britannica with Wikisource reference, Creative Commons Attribution-ShareAlike License, This page was last edited on 30 September 2020, at 11:55. [23][24][25], Xylene is also a skin irritant and strips the skin of its oils, making it more permeable to other chemicals. 0000016342 00000 n Like the individual isomers, the mixture is colorless, sweet-smelling, and highly flammable. There is very little information available that isolates xylene from other solvent exposures in the examination of these effects. 0000000016 00000 n Solvent evaporation depends on parameters specific to each solvent, plus air temperature and velocity. Evaporation rate; 0.8 Approximate Upper/lower flammability or explosive limits; 1.9 to 12.3 % by volume Approximate Vapour pressure; 1.893 kPa at 38 deg C Approximate