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SIGMA現(xiàn)貨,SIGMA代理

甲醛

時(shí)間:2011/12/2閱讀:519
分享:

 在家庭裝修中經(jīng)常會(huì)產(chǎn)生對(duì)人體有害的物質(zhì),甲醛就是zui普遍的一種,下面就來給大家介紹一下甲醛。

1.什么是甲醛?
(HCHO)是一種無色、有強(qiáng)烈刺激性、高毒性氣體。 
2.特性:
(1).,易溶于水、醇、醚----為什么刺鼻、辣眼?; 
(2).是氣態(tài),通常以水溶液形式出現(xiàn),40%水溶液——福爾馬林; 
(3).浮點(diǎn)低,19℃。在室溫時(shí)極易揮發(fā)并隨著溫度上升揮發(fā)速度加快----同一件家具為什么刺鼻、辣眼的異味夏天比冬天嚴(yán)重?。 
3.的用途: 
(1)——*的殺菌劑,防腐保存; 
(2)人造板工業(yè)所需脲醛樹脂膠、三聚氰氨膠、酚醛樹脂膠的重要原料。 
4.的危害 
(1)對(duì)人體健康的影響主要表現(xiàn)在嗅覺異常、肺功能異常、肝功能異常、免疫功能異常等——呼吸系統(tǒng); 
(2)強(qiáng)烈的致癌和促進(jìn)癌變作用; 
(3)長(zhǎng)期接觸低劑量的會(huì)引起慢性呼吸道疾病、女性月經(jīng)紊亂、妊娠綜合癥、新生兒體質(zhì)降低、染色體異常、影響青少年智力發(fā)育、造成記憶力下降、甚至引起鼻咽癌、白血病等; 
(4)高濃度的會(huì)毒害神經(jīng)系統(tǒng)、免疫系統(tǒng)、肝臟、甚至引起死亡。 
(5)據(jù)流行病學(xué)研究,長(zhǎng)期接觸的人,會(huì)引起鼻腔、口腔、消化道的癌癥。
 

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