Chidule

DEET (Chingerezi: diethylmethylbenzamide), yomwe chidule chake ndi DEET, dzina la mankhwala ndi diethyltoluamide, ndi mankhwala ophera tizilombo tosiyanasiyana. Amagwira ntchito yophera tizilombo tosiyanasiyana toluma m'malo osiyanasiyana ndipo amatha kuphera tizilombo toluma. Ntchentche, midges, black flies, chiggers, deer flies, utitiri, udzudzu, horse flies, udzudzu, sand flies, udzudzu, stable flies ndi nkhupakupa.

DEET idapangidwa ndi kupatsidwa patent ndi Unduna wa Zaulimi ku US panthawi ya Nkhondo Yachiwiri Yapadziko Lonse. Mankhwalawa adasankhidwa kukhala mankhwala othamangitsa udzudzu kuti agwiritsidwe ntchito ndi asilikali aku US mu 1946. Adalembetsedwa ndi US Environmental Protection Agency ngati mankhwala oletsa tizilombo mu 1957 ndipo adayamba kugwiritsidwa ntchito ndi anthu wamba. Poyamba ankagwiritsidwa ntchito ngati mankhwala ophera tizilombo m'mafamu. Pambuyo pake, boma la US lidapempha kuti ligwiritsidwe ntchito panthawi ya nkhondo, makamaka ku Vietnam ndi Southeast Asia. Malinga ndi ziwerengero za US Environmental Protection Agency, chaka chilichonse Chemicalbook Pafupifupi 40% ya aku America amagwiritsa ntchito mankhwala ophera tizilombo okhala ndi DEET, omwe amagwiritsidwa ntchito ndi anthu pafupifupi 200 miliyoni padziko lonse lapansi. Pazaka 40 zapitazi, kafukufuku wochitidwa ndi magulu ofufuza oposa 20,000 atsimikizira kuti DEET ndiye mankhwala otetezeka komanso ogwira mtima kwambiri ophera tizilombo pamsika. Mankhwala ophera tizilombo ambiri. Bungwe la World Health Organization limalimbikitsanso kugwiritsa ntchito mankhwala ophera tizilombo okhala ndi DEET kuti ateteze ku tizilombo tomwe timafalikira m'matupi. Nthawi zambiri amasakanizidwa ndi mankhwala ena ophera tizilombo, koma poizoni wake umawonjezeka akasakanizidwa ndi mankhwala ophera tizilombo a carbamate.

Katundu wa DEET

Nambala ya CAS 134-62-3

Fomula ya maselo C12H17NO

Kulemera kwa maselo 191.27

EINECS Nambala 205-149-7

Malo osungunuka -45°C

Malo otentha 111°C1mmHg

Kuchulukana 0.998g/mL pa 20°C (lit.)

Kuchuluka kwa nthunzi 6.7 (Chemicalbookvsair)

Kuthamanga kwa nthunzi <0.01mmHg (25°C)

Chizindikiro cha refractive n20/D1.523 (lit.)

Malo owunikira> 230°F

Zambiri zamalumikizidwe

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