- d4 (octamethylotetrasiloxane) d4

- D5 (DARAMEMHYHYLCKEXANA) D5

- D6 (D6 (D6DECamethylOxane) D6

Hana d4 da d5 a cikin kayayyakin kulawa na mutum:

Okakamethylakasiloxane (D4) da kuma yanke hukunci (D5) an kara suIsa Annex XVII ƙuntatawa jerin abubuwa(shigarwa 70)Dokokin Hukumar (EU) 2018/35a kan10 Jan 2018. Ba a sanya D5 a kasuwa a cikin samfuran wanke kayan wanka a cikin taro daidai da0.1%ta hanyar nauyi na kowane abu, bayan31 Janairu 2020.

Me yasa D4 da D5 ke ƙuntata?

D4 D5 sune Cycloxanes galibi a matsayin monomers don samar da silicone polymer. Suna kuma da amfani kai tsaye a cikin samfuran kulawa na mutum. An gano D4 a matsayinm, biaccumulative da mai guba (Pbt) da m m commcum cerioactulative (vpvb) abu. An gano D5 a matsayin kayan aikin VPVB.

Saboda damuwa cewa D4 da D5 na iya samun yuwuwar tara a cikin muhalli kuma da gangan ba a iya tsammani kuma ba za a iya tantancewa ba kuma ba za a iya tantancewa ba kuma ba za a iya tantancewa ba kuma ba za a iya tantancewa ba kuma ba za a iya tantancewa ba kuma ba za a iya tantancewa ba kuma ba za a iya tantancewa ba kuma ba za a iya tantancewa ba kuma ba za a iya tantancewa ba kuma ba za a iya tantancewa ba.Kimanin kuɗi (SEAC) kwamitin ya yarda da shawarar Burtaniya ta tabbatar da cewa kudaden kula da kayayyakin kula da su a watan Yuni na 2016 tunda suna iya gangara magudana da shigar da tabkuna, koguna, da tekuna.

An ƙuntata amfani da D4 da D5 a cikin wasu samfuran?

Ya zuwa yanzu D4 da d5 ba a taƙaita su a wasu samfuran. Echa yana aiki akan ƙarin tsari don ƙuntata D4 da D5 a cikiBar kan kayayyakin kulawa na mutumda sauranMasu amfani / samfurori masu sana'a(misali tsabtatawa mai bushe, da kakin zuma da kuma polshes, wankawa da kayan shaye-shaye). Za a gabatar da shawara don amincewaAfrilu 2018. Masana'antar masana'antu ta nuna karfin ra'ayi ne ga wannan ƙarin ƙuntatawa.

CikinMaris 2018, Echa ya kuma gabatar don ƙara D4 da D5 zuwa Jerin Svhc.

Tunani:

• Dokokin Hukumar (EU) 2018/35
• Kwamitin don kimantawa na haɗari (RANA) ya amince da tsari don ƙuntatawa D4 da D5 a ciki
• Wanke caskwics
• Niyya na ƙuntatawa D4 da D5 a cikin wasu samfuran
• Biranen Turai - ƙarin haɗakar kai hani ga D4 da D5 sun riga sun riga sun riga sun riga sun riga sun riga sun riga sun riga sun riga sun riga sun riga da rashin gaskiya - Yuni 2017

Menene silines?

Siliconones samfurori ne na musamman waɗanda ake amfani da su a ɗaruruwan Aikace-aikacen inda ake buƙatar aikinsu na musamman. Ana amfani dasu azaman adheres, suna rufe, kuma suna da kyakkyawan injin na inji / optical / juriya na ofictual tsakanin sauran kaddarorin da yawa. Ana amfani da su, alal misali, a cikin fasahar likita, makamashi mai sabuntawa da kuma adana kuzari, har da fasahar dijital, gini da sufuri.

Menene D4, D5 da D6 kuma a ina aka yi amfani da su?

Octamethylcyclotetrasiloxane (D4), Decamethylcyclopentasiloxane (D5) and Dodecamethylcyclohexasiloxane (D6) are used to create a diverse range of silicone materials that provide unique, beneficial characteristics to a wide variety of applications and products across sectors, including construction, electronics, engineering, health care, cosmetics and personal care.

D4, D5 da D6 ana yawan amfani da su azaman tsaka-tsaki na sunadarai, ma'ana cewa abubuwa suna aiki a cikin masana'antar rashin ƙarfi amma kawai a matsayin ƙwararrun ƙwararrun samfuran.

Menene ma'anar SVHC?

SVHC yana tsaye don "abu mai matukar damuwa sosai".

Wanene ya yi shawarar SVHC?

Yanke shawarar gano D4, D5, D6 kamar yadda kwamitin jihohin Eli memba ya yi, wanda ya hada da masana suka zabi kasashen EU da EU.

An nemi mambobin kungiyar ta MSCS din da Jamus don D4 da D5, kuma Echa don D6, da kuma maganganun da aka samu yayin tattaunawar jama'a.

A umurcewar wadannan kwararru ne don tantancewa da kuma tabbatar da ilimin kimiyya a karkashin Svhc bada shawarwari na SVHC, kuma ba don tantance yiwuwar tasirin.

Me yasa aka sanya D4, D5 da D6 da aka jera azaman SVHC?

Dangane da sharuɗɗa da aka yi amfani da su a kai, D4 sun hadu da ka'idoji don m, abubuwa masu guba (PBT) sun hadu da ka'idojin m, sosai commcumulative (vpvb) abubuwa.

Bugu da kari, D5 da D6 ana daukar PBT lokacin da suka ƙunshi fiye da 0.1% D4.

Wannan ya haifar da nadin da memba na EU ga jerin SVHCs. Koyaya, mun yi imani da ka'idojin ba su ba da damar cikakken shaidar kimiyya da ta dace ba.