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Tên sản phẩm: Javen – NaClO – Natri hypochlorit
Tên thường gọi : Javen , dịch tẩy trắng, Natri hypoclorit.
Công thức hoá học : NaClO .
Ngoại quan : Javen là dung dịch trong , màu vàng chanh. Có phản ứng Kiềm.
Xuất xứ: Việt Nam
Hàm lượng: 7%, 9%
Qui cách: Téc, phuy, bồn
Javen là một chất ôxy hóa mạnh, kém bền . Dễ bị phân hủy bởi axít và giải phóng ra khí Clo. NaClO bị phân huỷ mạnh bởi tác dụng của các kim lọai nặng như Fe, Ni, Co, Cu, Mn hay ôxít của chúng . Javen dễ bị phân dã dưói tác dụng của ánh sáng và nhiệt độ , nhất là môi trường có pH = 6 - 7
Máy điều chế Jave từ muối ăn
Ứng dụng
Javen được sử dụng làm chất tẩy màu, vết mốc, mực, nhựa cây cho đồ dùng bằng vải sợi. Tẩy trắng đồ men sứ …
Javen dùng trong khử trùng làm sạch nước sinh hoạt, sát trùng nhà ở, bệnh viện , nhà vệ sinh .
Javen được sử dụng trong ngành giấy – dệt nhuộm
Nguồn gốc tên Javen
Người điều chế ra Javen là Béc tơ lo ở tại thành phố Javel Javelvà được điều chế bằng cách điện phân dung dịch NaCl 20% không có màng ngăn hoặc tổng hợp trực tiếp hợp trực tiếp qua phản ứng giữa Natri hidroxide (NaOH) và khí clo
Phản ứng
Sodium hypochlorite phản ứng với các kim loại dần dần, chẳng hạn như kẽm Javen phản ứng với acid hydrochloric HCl để giải phóng khí clo
NaClO phản ứng với các axit khác, chẳng hạn như axit axetic, để giải phóng axit hypochlorous
Natri hypoclorit bị phân hủy khi đun nóng để tạo thành Clorat natri và natri clorua
Khi hòa tan trong dung dịch nước, nó từ từ sẽ bị phân hủy, giải phóng clo, oxy, và sodium hydroxide.
An toàn
Javen là một chất ôxy hóa mạnh mẽ . Phản ứng oxy hóa có tính ăn mòn, giải pháp đốt cháy da và gây tổn thương mắt, đặc biệt, khi được sử dụng trong các hình thức tập trung. Tuy nhiên, như được công nhận bởi NFPA, giải pháp duy nhất có chứa hơn 40% Javentheo trọng lượng được coi là chất ô xi hóa nguy hiểm. Giải pháp ít hơn 40% được phân loại như là một mối nguy hiểm oxy hóa trung bình (430 NFPA, 2000).
Nước Javen rất nguy hiểm, cần tránh tiếp xúc với mắt.
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