Attach the sample to a thermometer with a tiny rubber band, positioning the sample flush with the bottom of the thermometer. Mineral oil, heavy or light; (paraffin oil; Deobase, deodorized; heavy paraffinic; heavy naphthenic); distillates; includes 64741-53-3, 64741-88-4, 8042-47-5, 8012-95-1; 64742-54-7 140 mg/m3 : 1500 mg/m3 : 8900 mg/m3 (DOE, 2016) Regulatory Information. Material Properties - Material properties for gases, fluids and solids - densities, specific heats, viscosities and more ; Melting points - freezing points - Documents giving melting or freezing point of elements and different kind of chemical species at varying conditions; Related Documents . Have questions or comments? Soybean oil, hardened 342. Record the first temperature of the melting range with the appearance of the first visible drop of liquid. Failure to pack the solid well may cause it to shrink when heating, which can cause confusion as to the correct melting temperature. Obtain a glass capillary melting point tube, which has one end sealed and the other end open. Rapeseed oil (HEAR) Rice bran oil. Palm stearin Peanut oil . Organic Chemistry Laboratory Techniques is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. Insert the capillary tube containing the sample into a slot behind the viewfinder of a melting point apparatus (Figure 6.11a). If the solid is granular, pulverize the solid somewhat before packing. Explore the latest full-text research PDFs, articles, conference papers, preprints and more on MELTING POINT ANALYSIS. Legal. Record the second temperature of the melting range when the entire sample has just melted (Figure 6.16d), which occurs when all portions of the opaque solid have turned to a transparent liquid. Record the first temperature of the melting range with the appearance of the first visible drop of liquid. The thermometer should not touch the sides of the glass, and if it does it should be clamped in such a way that it no longer touches. Thiele Tube Method. If another melting point trial is to be performed directly after the first, the metal block should be rapidly cooled to at least \(20^\text{o} \text{C}\) below the next melting point by touching it with wet paper towels (Figure 6.11d) or cooling it with a jet of air. All rights reserved. Although bubbles should not be seen in the Thiele tube as it warms, they commonly are seen if the tube is used for other purposes (bubbles are seen in Figure 6.15d). ChemicalBook Provide 8042-47-5(Mineral oil)Melting Point Boiling Point Density,8042-47-5(Mineral oil) CAS Chemical Properties MSDS. Jab the open end of the tube into a pile of the solid to be analyzed (Figure 6.10a). At first it may seem as if the sides of the solid glisten (Figure 6.13b), and the temperature should be recorded when a droplet is seen on the side or bottom of the tube (a hint of movement will be noticed in the tube, Figure 6.13c). Missed the LibreFest? The LibreTexts libraries are Powered by MindTouch® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. 6.1D: Step-by-Step Procedures for Melting Point Determination, [ "article:topic", "authorname:nicholsl", "Thiele Tube Method", "Melting Point Apparatus", "showtoc:no", "license:ccbyncnd" ]. Watch the recordings here on Youtube! Vernier MeltStation). … Lisa Nichols (Butte Community College). Mineral oil is any of various colorless, odorless, light mixtures of higher alkanes from a mineral source, particularly a distillate of petroleum, as distinct from usually edible vegetable oils.. Look through the viewfinder (Figure 6.11c) to see a magnified view of the sample in the apparatus, which should be illuminated. Insert the sample into a Thiele tube, so that the sample is near the middle of the tube. Rapeseed oil 344. Then, drop the capillary tube closed side down several times through a long narrow tube (glass tube or cut PVC pipe, Figure 6.10 c). Mineral Oil, Light and Heavy MSDS# 17996 Section 1 - Chemical Product and Company Identification MSDS Name: Mineral Oil, Light and Heavy Catalog Numbers: BP2629-1, NC9854214, O121-1, O121-20, O121-4, O122-1, O122-4, O122-4LC, O2-20, O5-20 Synonyms: White mineral oil (petroleum); saturated hydrocarbons. Take note of the decomposition temperature, as it is sometimes as reliable a reference point as a compound's melting point. The solid must be dry or the results will be affected as solvent can act as an impurity and affect the melting range. Then heat very slowly (\(1^\text{o} \text{C}\) every 30 seconds). The following unusual situations may occur in the process: The sample may begin to darken, which indicates decomposition is occurring before the sample is melting. \(120\)-\(122^\text{o} \text{C}\). Blank Sulfur Oil Standard in Base Oil, For Diesel Fuel Analysis, Mineral oil suitable for preparation of Nujol mulls for infrared spectroscopy, light oil, Mineral oil, suitable for nujol Mull preparations for IR-spect., for spectroscopy 1LT, orderCN@merckgroup.com;orderCN@merckgroup.com, Copyright 2017 © ChemicalBook. Repeat the process with a fresh sample after allowing the apparatus to cool and use the recommendations in prompt 4 to perform a more careful assessment of the melting point. 371 Cottonseed oil . If the oil is not subsequently changed, the sample may boil when heated in the tube. 341 Palm olein. If needed, repeat the previous steps to load sample until it is a height of \(2\)-\(3 \: \text{mm}\) in the tube (when packed, Figure 6.10d). Sublimation may be noticed by a ring of solid above where the sample is heated. Safflower oil Sesame oil. Corn oil . Obtain a Thiele tube and clamp it to a ring stand or latticework (Figure 6.15b). Chemsrc provides Mineral oil(CAS#:8042-47-5) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. As the oil warms and becomes less dense, it will rise and travel up the triangular portion of the tube. Use the letter "d" after a melting point to indicate decomposition (e.g. If the expected melting point of the compound is NOT known, heat the sample at a medium rate the entire time and determine an approximate melting point. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. Record the temperature where the first droplet of liquid is seen (there is movement in the tube). Place the rubber stopper and thermometer assembly into the Thiele tube, adjusting the height so that the sample is midway inside the tube (Figure 6.15c). Record the second temperature of the melting range when the entire sample has just melted (Figure 6.13d), which occurs when all portions of the opaque solid have turned to a transparent liquid. Oil / Fat: Coconut oil . Turn on the apparatus and adjust the setting to an appropriate heating rate (Figure 6.11b). The name mineral oil by itself is imprecise, having been used for many specific oils over the past few centuries. Cleanup note: drops of mineral oil on the benchtop do not easily wipe away, but can be cleaned by a paper towel soaked with either window cleaner or hexanes. Presented in this section are traditional methods that use an electrical melting point apparatus and Thiele tube.

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