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  2. Hydrofluoric acid - Wikipedia

    en.wikipedia.org/wiki/Hydrofluoric_acid

    Hydrofluoric acid is a solution of hydrogen fluoride (HF) in water.Solutions of HF are colorless, acidic and highly corrosive.A common concentration is 49% (48-52%) but there are also stronger solutions (e.g. 70%) and pure HF has a boiling point near room temperature.

  3. List of water-miscible solvents - Wikipedia

    en.wikipedia.org/wiki/List_of_water-miscible...

    CAS number CH 3 CHO: acetaldehyde: 75-07-0 CH 3 CO 2 H: ... 7664-39-3 H 2 SO 4: sulfuric acid: 7664-93-9 HCl: hydrochloric acid: 7647-01-0 See also

  4. Hydrogen fluoride - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_fluoride

    CAS Number. 7664-39-3 ... a component of high-octane petrol , is generated in alkylation units, which combine C 3 and C 4 olefins and iso-butane.

  5. List of CAS numbers by chemical compound - Wikipedia

    en.wikipedia.org/wiki/List_of_CAS_numbers_by...

    Chemical formula Synonyms CAS number C 10 H 16 N 2 O 8: Ethylenediaminetetraacetic acid (EDTA): 6381–92–6 C 12 H 22 O 11: sucrose: 57–50–1 C 18 H 29 O 3 S: sodium dodecyl benzenesulfonate: 2155–30–0

  6. Immediately dangerous to life or health - Wikipedia

    en.wikipedia.org/wiki/Immediately_dangerous_to...

    CAS ICSC mg/m 3 ppm 75-07-0: 0009: Acetaldehyde: 3600 mg/m 3: 2000 ppm: ... 7664-39-3: 0283: Hydrogen fluoride: 24.6 mg/m 3: 30 ppm: 7664393: 7722-84-1-Hydrogen ...

  7. Painting found at garage sale is a Van Gogh, experts say - AOL

    www.aol.com/painting-found-garage-sale-van...

    A painting bought at a garage sale in Minnesota is a previously unknown portrait by Dutch artist Vincent Van Gogh, according to a newly published expert analysis.. It was made by Van Gogh during ...

  8. Why You Should Never Try to Out-Run a Grizzly Bear - AOL

    www.aol.com/why-never-try-run-grizzly-174419138.html

    Tip #3: Don’t Climb a Tree. Despite popular belief, grizzlies can climb trees like many other bears. A determined bear will have no problem reaching you, so seeking refuge in a tree isn’t a ...

  9. CAS Registry Number - Wikipedia

    en.wikipedia.org/wiki/CAS_Registry_Number

    The check digit is found by taking the last digit times 1, the preceding digit times 2, the preceding digit times 3 etc., adding all these up and computing the sum modulo 10. For example, the CAS number of water is 7732-18-5: the checksum 5 is calculated as (8×1 + 1×2 + 2×3 + 3×4 + 7×5 + 7×6) = 105; 105 mod 10 = 5.