• Home
  • About
  • Chemistry
    • Solvent of the Week
    • Compound of the Week
    • Reagent of the week
    • Publications
    • Translations
    • Glassware designs
    • Advanced Preparative Separation
    • Videos
    • A day in a mineral lab
    • A day in a wine lab
    • A day in a polyurethane lab
  • Philosophy
    • Poor Matthew
    • On Australian coins
    • On global warming
    • On aluminium cans
    • Questions to ask potential housemates
    • Why chemistry skills are now less valued than they were
    • Tribute to Mr John Clarke
    • Theory on Covid-19
  • Photos
  • Blog
MJLPHD

Matthew's list of specialty gases—compounds with boiling points below 35 °C

30/9/2016

0 Comments

 
When I was working recently with plumbers we had much discussion about gas fitting and which compounds can be plumbed. Plumbers are also frequently using a flame for welding and soldering. One such product that is easy to carry is a small yellow bottle that the plumbers know only as MAPP gas. I at first wondered if it were propane, butane or acetylene. I later learned that it was none of these and in fact propylene.

Below is a list of non-alkane compounds that I believe can be plumbed. The ones with BP of 15–35 °C will probably need a heated pipe.
Species                                                   Formula                                      BP (°C)
Helium                                                     He                                           −269
Hydrogen                                                 H2                                           −253
Deuterium                                                D2                                           −253
Carbon Monoxide                                   CO                                          −191.5
Argon                                                        Ar                                            −186
Nitrogen                                                   N2                                           −196
Oxygen                                                     O2                                           −183
Ozone                                                       O3                                           −112
Phosphine                                              PH3                                          −88
Nitrous Oxide                                        N2O                                           −88
Hydrogen Chloride                               HCl                                           −85
Acetylene                                          H−C≡C−H                                     −84
Carbon Dioxide                                     CO2                                         −78.5
Tetrafluoroethylene                        F2C=CF2                                      −76
Hydrogen Bromide                               HBr                                          −67
Sulphur hexafloride                             SF6                                           −64
Hydrogen Sulphide                              H2S                                          −60
Propylene (MAPP gas)                  H3C−CH=CH2                              −47
Selenium hexafluoride                       SeF6                                        −46.6
Sulphur tetrafluoride                           SF4                                          −38
Hydrogen Iodide                                   HI                                            −35
Chlorine                                                 Cl2                                           −34
Ammonia                                              NH3                                          −33
1,1,1,2-Tetrafluoroethane (R134a)   F3C−CFH2                               −26
Dimethyl ether                              H3C−O−CH3                                  −24
Chloromethane                                  CH3Cl                                         −24
1-Chloro-1,2,2,2-tetrafluoroethane   F3C−CFClH                           −12
1-Butene                                    H2C=CH−CH2−CH3                          −6.5
Methylamine                                    CH3NH2                                       −6
trans-2-Butene                        H3C−CH=CH−CH3                              0.9
cis-2-Butene                            H3C−CH=CH−CH3                              3.7
Bromomethane                                  CH3Br                                           4
Methyl mercaptan                             H3C−SH                                        6
Ethyl methyl ether                           EtOMe                                            7
Phosgene                                              COCl2                                          8
Ethylamine                                  CH3CH2NH2                                      16
Hydrogen Cyanide                               HCN                                           25
Disulphur decafluoride                       S2F10                                          30
1,1-Dichloro-1-fluoroethane (R141b)   CCl2F−CH3                          32

matthew_list_of_specialty_gases.xlsx
File Size: 10 kb
File Type: xlsx
Download File

0 Comments

    Matthew's Chemistry blog.

    A chronicle of tips, tricks & stories

    Contributions from readers are welcome and should be emailed to matthew.leonard742@gmail.com

    Archives

    September 2016
    December 2015
    September 2015
    July 2015
    June 2015
    May 2015
    April 2015
    March 2015
    February 2015
    January 2015
    December 2014
    November 2014
    October 2014
    September 2014
    August 2014
    July 2014
    May 2014
    March 2014
    February 2014
    January 2014
    December 2013
    November 2013
    October 2013

Powered by Create your own unique website with customizable templates.