1-propaanitioli

1-propaanitioli
Tunnisteet
IUPAC-nimi 1-merkaptopropaani
CAS-numero 107-03-9
PubChem CID 7848
Ominaisuudet
Molekyylikaava C3H8S
Moolimassa 76.2 g/mol g/mol
Ulkomuoto Väritön neste
Sulamispiste −113 °C (160 K)
Kiehumispiste 68 °C (341 K)
Tiheys 0,84 g/cm3
Liukoisuus veteen veteen 0,190 g/100 ml (25 °C)

Helposti syttyvä Haitallinen / ärsyttävä Syövyttävä[1]

1-propaanitioli on orgaaninen yhdiste (tioli), joka on helposti syttyvää, huoneenlämmössä (20 °C) olomuodoltaan väritöntä nestettä, jolla on tunnusomainen haju. Sen kemiallinen kaava on C3H8S ja rakennekaava on CH3(CH2)2SH. 1-propaanitiolista käytetään myös nimityksiä 1-merkaptopropaani, propaani-1-tioli ja n-propyylimerkaptaani.

1-propaanitiolin moolimassa on 76,2 g/mol, sulamispiste −113 °C, kiehumispiste 68 °C, tiheys 0,84 g/cm3, leimahduspiste −20 °C ja CAS-numero 107-03-9. Lämpötilan ollessa 25 °C 1-propaanitioli liukenee veteen 0.190 g/100 ml. Aineen höyry on ilmaa raskaampaa ja voi siten kulkeutua maata pitkin syttyen etäällä vuotokohdasta, sillä 1-propaanitiolin suhteellinen höyry-ilma-seoksen tiheys 20 °C:ssa (ilma = 1) on 1.101.

Palaessa 1-propaanitioli muodostaa syövyttäviä huuruja, jotka sisältävät rikkivetyä (H2S) ja rikin oksideja. Aine reagoi kiivaasti hapettimien, pelkistävien aineiden, vahvojen happojen, vahvojen emästen kanssa.

1-propaanitiolia esiintyy mm. keltasipulissa (Allium cepa), kesäpurjossa (Allium ampeloprasum), perunassa (Solanum tuberosum), herneessä (Pisum sativum) ja tarhapavussa (Phaseolus vulgaris).

Ympäristö- ja terveysvaikutukset

Lyhytaikainen altistus ärsyttää silmiä, ihoa ja hengitysteitä. Altistuminen suurille ainepitoisuuksille voi aiheuttaa tajunnantason laskua.

Katso myös

Lähteet

Viitteet

  1. ↑ 1-Propaanitioli Käyttöturvallisuustiedote. 21.5.2015. Sigma Aldrich (Merck). Viitattu 3.9.2018.

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