Difference between revisions of "Absolute alcohol"
Jump to navigation
Jump to search
(username removed) |
|||
| (4 intermediate revisions by 3 users not shown) | |||
| Line 1: | Line 1: | ||
== Description == | == Description == | ||
| − | Pure [ | + | Pure [[ethyl%20alcohol|ethanol]] that contains less than one percent of water. Ethyl alcohol is miscible in water at all proportion and distills as an azeotrope (constant boiling mixture) containing 5% water. For complete dehydration, ethanol is mixed with [[mineral%20spirits|mineral spirits]], [[turpentine%20%28oil%29|turpentine]], or [[quicklime|quicklime]] and redistilled. Absolute alcohol is often preferred as a solvent for lacquers since they dry clearer and harder in the absence of moisture. Absolute alcohol is strongly [[hygroscopic|hygroscopic]] and will reabsorb water from the air in an open container. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
| Line 7: | Line 7: | ||
pure ethyl alcohol; anhydrous alcohol; anhydrous ethanol | pure ethyl alcohol; anhydrous alcohol; anhydrous ethanol | ||
| + | == Risks == | ||
| + | |||
| + | * Flammable. Flash point = 13 C (55 F) | ||
| + | * Fisher Scientific: [https://fscimage.fishersci.com/msds/89907.htm MSDS] | ||
| + | |||
| + | == Physical and Chemical Properties == | ||
{| class="wikitable" | {| class="wikitable" | ||
|- | |- | ||
| Line 16: | Line 22: | ||
|- | |- | ||
! scope="row"| Melting Point | ! scope="row"| Melting Point | ||
| − | | -114 | + | | -114 C |
|- | |- | ||
! scope="row"| Density | ! scope="row"| Density | ||
| − | | 0.789 | + | | 0.789 g/ml |
|- | |- | ||
! scope="row"| Molecular Weight | ! scope="row"| Molecular Weight | ||
| Line 28: | Line 34: | ||
|- | |- | ||
! scope="row"| Boiling Point | ! scope="row"| Boiling Point | ||
| − | | 78.5 | + | | 78.5 C |
|} | |} | ||
| − | == | + | ==Resources and Citations== |
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | * | + | * ''The Merck Index'', Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996 Comment: flash point = 55 F (13 C) |
* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 310 | * G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 310 | ||
Latest revision as of 13:26, 18 April 2022
Description
Pure ethanol that contains less than one percent of water. Ethyl alcohol is miscible in water at all proportion and distills as an azeotrope (constant boiling mixture) containing 5% water. For complete dehydration, ethanol is mixed with Mineral spirits, turpentine, or Quicklime and redistilled. Absolute alcohol is often preferred as a solvent for lacquers since they dry clearer and harder in the absence of moisture. Absolute alcohol is strongly Hygroscopic and will reabsorb water from the air in an open container.
Synonyms and Related Terms
pure ethyl alcohol; anhydrous alcohol; anhydrous ethanol
Risks
- Flammable. Flash point = 13 C (55 F)
- Fisher Scientific: MSDS
Physical and Chemical Properties
| Composition | C2H5OH |
|---|---|
| CAS | 64-17-5 |
| Melting Point | -114 C |
| Density | 0.789 g/ml |
| Molecular Weight | mol. wt. = 46.07 |
| Refractive Index | 1.361 |
| Boiling Point | 78.5 C |
Resources and Citations
- The Merck Index, Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996 Comment: flash point = 55 F (13 C)
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 310
- Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
- Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)