- D4 (Octamethylcyclotetrasiloxane) D4
- D5 (Decamethylcyclopentasiloxane) D5
- D6 (Dodecamethylcyclohexasiloxane) D6
Kuletsa kwa D4 ndi D5 mu Zosamalira Munthu:
Octamethylcyclotetrasiloxane (D4ndi decamethylcyclopentasiloxane (D5) zawonjezeredwaFIKIRANI mndandanda wa zinthu zoletsedwa za Annex XVII(kulowa 70) ndiCOMMISION REGULATION (EU) 2018/35paJanuware 10, 2018. D4 ndi D5 sizidzayikidwa pamsika muzodzikongoletsera zotsuka muzambiri zofanana kapena zokulirapo kuposa.0.1 %ndi kulemera kwa chinthu chilichonse, pambuyo pake31 Januware 2020.
| Mankhwala | Zoyenera Kuletsa |
| OctamethylcyclotetrasiloxaneNambala ya EC: 209-136-7, Nambala ya CAS: 556-67-2 Decamethylcyclopentasiloxane Nambala ya EC: 208-746-9, Nambala ya CAS: 541-02-6 | 1. Sizidzaikidwa pamsika wa zodzikongoletsera zotsukidwa mumsewu wofanana kapena wokulirapo kuposa 0.1 % pa kulemera kwa chinthu chilichonse, pambuyo pa 31 Januware 2020.2. Pazifukwa zolembera izi, "zodzoladzola zotsuka" zimatanthawuza zodzikongoletsera monga momwe zafotokozedwera mu Article 2(1)(a) of Regulation (EC) No 1223/2009 kuti, pansi pazikhalidwe zogwiritsidwa ntchito, zimatsukidwa. ndi madzi pambuyo popaka.' |
Chifukwa chiyani D4 ndi D5 Amaletsedwa?
D4 ndi D5 ndi ma cyclosiloxanes omwe amagwiritsidwa ntchito kwambiri ngati ma monomers popanga silicone polima. Amakhalanso ndi ntchito yolunjika pazinthu zosamalira anthu. D4 yadziwika ngati akulimbikira, bioaccumulative ndi poizoni (PBT) komanso kulimbikira kwambiri bioaccumulative (vPvB) chinthu. D5 yadziwika ngati chinthu cha vPvB.
Chifukwa chodetsa nkhawa kuti D4 ndi D5 zitha kudziunjikira m'chilengedwe ndikuyambitsa zotsatira zosayembekezereka komanso zosasinthika pakapita nthawi, ECHA's Risk Assessment (RAC) ndi Socio Economic.Makomiti Owunika (SEAC) adagwirizana ndi lingaliro la UK loletsa D4 ndi D5 muzinthu zotsuka m'miyezi ya June 2016 popeza atha kulowa mumtsinje ndikulowa m'nyanja, mitsinje, ndi nyanja.
Kugwiritsa Ntchito Moletsa kwa D4 ndi D5 Pazinthu Zina?
Pakadali pano D4 ndi D5 sizoletsedwa muzinthu zina. ECHA ikugwira ntchito pamalingaliro owonjezera oletsa D4 ndi D5 mkatikusiya katundu wodzisamalirandi zinaogula/akatswiri mankhwala(monga kuchapa, phula ndi kupukuta, kuchapa ndi kuchapa zinthu). Cholingacho chidzaperekedwa kuti chivomerezedwe muEpulo 2018. Makampani atsutsa kwambiri lamulo lowonjezerali.
MuMarichi 2018, ECHA yakonzanso kuwonjezera D4 ndi D5 pamndandanda wa SVHC.
Ndemanga:
- COMMISION REGULATION (EU) 2018/35
- Komiti Yowunika Zowopsa (RAC) Ivomereza Pempho Loletsa Kugwiritsa Ntchito D4 ndi D5 mu
- Zodzoladzola Zosamba
- Zolinga za Kuletsa kwa D4 ndi D5 mu Zogulitsa Zina
- Slicones Europe - Zoletsa zowonjezera za REACH za D4 ndi D5 nzosakhalitsa komanso zosayenera - June 2017
Kodi ma silicones ndi chiyani?
Ma silicones ndi zinthu zapadera zomwe zimagwiritsidwa ntchito m'mapulogalamu mazana ambiri pomwe ntchito yawo yapadera imafunikira. Amagwiritsidwa ntchito ngati zomatira, amatsekereza, ndipo ali ndi makina abwino kwambiri / owoneka bwino / otenthetsera kukana pakati pa zinthu zina zambiri. Amagwiritsidwa ntchito, mwachitsanzo, mu teknoloji yachipatala, njira zowonjezera mphamvu zowonjezera mphamvu ndi mphamvu zopulumutsa mphamvu, komanso zamakono zamakono, zomangamanga ndi zoyendetsa.
Kodi D4, D5 ndi D6 ndi chiyani ndipo amagwiritsidwa ntchito kuti?
Octamethylcyclotetrasiloxane (D4), Decamethylcyclopentasiloxane (D5) ndi Dodecamethylcyclohexasiloxane (D6) amagwiritsidwa ntchito popanga zinthu zosiyanasiyana za silikoni zomwe zimapereka mawonekedwe apadera, opindulitsa kuzinthu zosiyanasiyana zomwe zimagwiritsidwa ntchito ndi mankhwala m'madera osiyanasiyana, kuphatikizapo zomangamanga, zamagetsi, zomangamanga, chisamaliro chaumoyo. , zodzoladzola ndi chisamaliro chaumwini.
D4, D5 ndi D6 amagwiritsidwa ntchito mobwerezabwereza ngati mankhwala opangira mankhwala, kutanthauza kuti zinthuzo zimagwiritsidwa ntchito popanga koma zimangokhala ngati zonyansa zotsika pamapeto.
Kodi SVHC imatanthauza chiyani?
SVHC imayimira "Substance of Very High Concern".
Ndani adapanga chisankho cha SVHC?
Chigamulo chozindikiritsa D4, D5, D6 ngati SVHC chinapangidwa ndi ECHA Member States Committee (MSC), yomwe ili ndi akatswiri osankhidwa ndi Mayiko a EU ndi ECHA.
Mamembala a MSC adafunsidwa kuti awonenso zolemba zaukadaulo zomwe Germany idapereka pa D4 ndi D5, ndi ECHA ya D6, komanso ndemanga zomwe adalandira pakukambirana ndi anthu.
Udindo wa akatswiriwa ndikuwunika ndikutsimikizira maziko asayansi omwe amathandizira malingaliro a SVHC, osati kuwunika zomwe zingachitike.
Chifukwa chiyani D4, D5 ndi D6 adalembedwa ngati SVHC?
Kutengera ndi mfundo zomwe zimagwiritsidwa ntchito mu REACH, D4 imakwaniritsa zofunikira za Persistent, Bioaccumulative and Toxic (PBT), ndipo D5 ndi D6 zimakwaniritsa zofunikira za Persistent, Very Bioaccumulative (vPvB) zinthu.
Kuonjezera apo, D5 ndi D6 amaonedwa kuti ndi PBT pamene ali ndi zoposa 0.1% D4.
Izi zidapangitsa kuti Mayiko Amembala a EU asankhidwe pamndandanda wa ma SVHC. Komabe, timakhulupirira kuti njirazi sizilola kuti umboni wonse wa sayansi uganizidwe.
Nthawi yotumiza: Jun-29-2020