{"data":{"id":"us/27-cfr-21.101","jurisdiction":"us","citation":"27 CFR 21.101","heading":"tert-Butyl alcohol.","body":"(a) Acidity (as acetic acid). 0.003 percent by weight maximum.\n(b) Color. Colorless.\n(c) Distillation range. When 100 mL of tertiary butyl alcohol are distilled, none should distill below 78 °C. and none above 85 °C. More than 95 percent should distill between 81 °−83 °C.\n(d) Dryness at 20 °C. Miscible without turbidity with 19 volumes of 60° Bé1. gasoline.\n(e) Freezing point (first needle). Above 20 °C.\n(f) Identification test. Place five drops of a solution containing approximately 0.1 percent tertiary butyl alcohol in ethyl alcohol in a test tube. Add 2 mL of Denige's reagent (dissolve 5 grams of red mercuric oxide in 20 mL of concentrated sulfuric acid; add this solution to 80 mL of distilled water, and filter when cool). Heat the mixture just to the boiling point and remove from the flame. A yellow precipitate forms within a few seconds.\n(g) Nonvolatile matter. Less than 0.005 percent by weight.\n(h) Odor. Characteristic odor.\n(i) Residual odor after evaporation. None.\n(j) Specific gravity at 25 °/25 °C. 0.780 to 0.786.","path":["Title 27—Alcohol, Tobacco Products and Firearms","CHAPTER I—ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF THE TREASURY","SUBCHAPTER A—ALCOHOL","PART 21—FORMULAS FOR DENATURED ALCOHOL AND RUM","Subpart E—Specifications for Denaturants"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-27.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:11Z","sha256":"e8d79b534faeefc3fa5a7bbed3776851589847b6ad55ae24ce3e38e5da9a7c16","source_id":"us-cfr","stale":true,"prev":"us/27-cfr-21.100","next":"us/27-cfr-21.102"},"notice":"GroundRules: Original legal text. Not legal advice."}