비소(As)는 회색의 부서지기 쉬운 준금속 고체이다. 주로 황화물 모습로 수많은 광물에 포함되어 있으나 일부 순수한 원소 형태로도 존재한다. 회색, 흑색, 검은색 등의 3가지 동소체가 있는데 가장 흔하고 안정적인 동소체는 회색 비소로서 금속비소 또는 알파비소라고도 부른다. 비소 및 비소화합물은 집적회로, 발광다이오드, 배터리 등의 산업분야에 사용되고 있다.
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중국은 역사적으로 흰 피부가 미인의 상징으로 인식돼 왔다. 그런 만큼 많은 남성들이 피부색 관리에 신경쓰고 있는데, 2018년 중국 미백시장 크기는 한화 약 72조 8천억 원에 달한다. 요즘엔 미40개선 식품에 대한 인기도 높다. 2019년 3월 기준 미80개선 식품의 온라인 판매액은 작년 동기대비 880% 올랐으며 전체 미용식품 구매자 중 46%가 미백 기능식품을 구매하는
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