{"id":1286,"date":"2024-02-23T09:07:06","date_gmt":"2024-02-23T09:07:06","guid":{"rendered":"https:\/\/nbtchemical.com\/?post_type=product&p=1286"},"modified":"2024-02-23T09:07:06","modified_gmt":"2024-02-23T09:07:06","slug":"axit-oxalic-h2c2o4-996","status":"publish","type":"product","link":"https:\/\/vinachemistry.com\/vi\/product\/axit-oxalic-h2c2o4-996\/","title":{"rendered":"Axit oxalic- H2C2O4 99,6%"},"content":{"rendered":"

C\u00f4ng th\u1ee9c h\u00f3a h\u1ecdc :\u00a0C2<\/sub>H2<\/sub>O4<\/sub>\u00a0. 2 H2<\/sub>O ho\u1eb7c (COOH)2<\/sub>\u00a0. 2 H2<\/sub>O ho\u1eb7c\u00a0C2<\/sub>H6<\/sub>O6<\/sub><\/strong>
\nT\u00ean h\u00f3a h\u1ecdc :\u00a0Axit oxalic, Oxalic acid<\/strong>
\nXu\u1ea5t x\u1ee9:\u00a0Trung Qu\u1ed1c<\/b>
\nQuy c\u00e1ch :\u00a025 kg\/ bao<\/strong><\/p>\n

T\u00ednh ch\u1ea5t v\u1eadt l\u00fd:<\/strong> H\u1ea1t tinh th\u1ec3 tr\u1eafng, tr\u1eafng ng\u00e0<\/p>\n

T\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc:<\/strong><\/p>\n

Axit oxalic l\u00e0 m\u1ed9t axit t\u01b0\u01a1ng \u0111\u1ed1i m\u1ea1nh m\u1ebd, m\u1eb7c d\u00f9 l\u00e0 m\u1ed9t axit cacboxylic:<\/p>\n

C2O4H2 \u21cc C2O4H\u2212 + H+ pKa = 1.27<\/p>\n

C2O4H\u2212 \u21cc C2O2\u22124 + H+ pKa = 4.27<\/p>\n

Axit oxalic tham gia nhi\u1ec1u ph\u1ea3n \u1ee9ng \u0111\u1eb7c tr\u01b0ng c\u1ee7a axit cacboxylic kh\u00e1c. N\u00f3 t\u1ea1o th\u00e0nh este: nh\u01b0 dimethyl oxalate (M.P. 52,5-53,5 \u00b0 C (126,5-128,3 \u00b0 F)). Ngo\u00e0i ra n\u00f3 c\u0169ng t\u1ea1o ra m\u1ed9t axit clorua \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 oxalyl clorua..<\/p>\n

Oxalat, baz\u01a1 li\u00ean h\u1ee3p c\u1ee7a axit oxalic, l\u00e0 m\u1ed9t ph\u1ed1i t\u1eed tuy\u1ec7t v\u1eddi cho c\u00e1c ion kim lo\u1ea1i, v\u00ed d\u1ee5 thu\u1ed1c oxaliplatin.<\/p>\n

Axit oxalic v\u00e0 oxalat th\u1ec3 b\u1ecb oxy h\u00f3a b\u1edfi permanganat trong m\u1ed9t ph\u1ea3n \u1ee9ng x\u00fac t\u00e1c.<\/p>\n

Oxalat l\u00e0 m\u1ed9t ph\u1ed1i th\u1ec3 tuy\u1ec7t v\u1eddi cho c\u00e1c ion kim lo\u1ea1i, trong \u0111\u00f3 n\u00f3 th\u01b0\u1eddng li\u00ean k\u1ebft d\u01b0\u1edbi d\u1ea1ng ph\u1ed1i th\u1ec3 ki\u1ec3u \u201chai r\u0103ng\u201d, t\u1ea1o th\u00e0nh m\u1ed9t v\u00f2ng 5-th\u00e0nh vi\u00ean d\u1ea1ng MO2C2. M\u1ed9t ph\u1ee9c ch\u1ea5t \u0111\u1ec3 minh h\u1ecda l\u00e0 [Fe(C2O4)3]3-. \u00c1i l\u1ef1c c\u1ee7a c\u00e1c ion kim lo\u1ea1i \u0111\u00f4i khi \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n trong xu h\u01b0\u1edbng t\u1ea1o th\u00e0nh c\u00e1c ch\u1ea5t k\u1ebft t\u1ee7a. V\u00ec v\u1eady, ax\u00edt oxalic c\u0169ng k\u1ebft h\u1ee3p v\u1edbi c\u00e1c kim lo\u1ea1i nh\u01b0 canxi, s\u1eaft, natri, magi\u00ea v\u00e0 kali trong c\u01a1 th\u1ec3 \u0111\u1ec3 t\u1ea1o th\u00e0nh c\u00e1c tinh th\u1ec3 c\u1ee7a c\u00e1c mu\u1ed1i oxalat t\u01b0\u01a1ng \u1ee9ng, ch\u00fang l\u00e0 c\u00e1c ch\u1ea5t k\u00edch th\u00edch ru\u1ed9t v\u00e0 th\u1eadn. Do n\u00f3 li\u00ean k\u1ebft v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n dinh d\u01b0\u1ee1ng quan tr\u1ecdng nh\u01b0 canxi, n\u00ean vi\u1ec7c s\u1eed d\u1ee5ng d\u00e0i h\u1ea1n c\u00e1c lo\u1ea1i l\u01b0\u01a1ng th\u1ef1c, th\u1ef1c ph\u1ea9m ch\u1ee9a nhi\u1ec1u ax\u00edt oxalic c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn s\u1ef1 thi\u1ebfu h\u1ee5t ch\u1ea5t dinh d\u01b0\u1ee1ng. Nh\u1eefng ng\u01b0\u1eddi kh\u1ecfe m\u1ea1nh c\u00f3 th\u1ec3 ti\u00eau th\u1ee5 m\u1ed9t c\u00e1ch an to\u00e0n c\u00e1c th\u1ee9c \u0103n nh\u01b0 th\u1ebf \u1edf m\u1ee9c \u0111\u1ed9 v\u1eeba ph\u1ea3i, nh\u01b0ng nh\u1eefng ng\u01b0\u1eddi c\u00f3 c\u00e1c r\u1ed1i lo\u1ea1n li\u00ean quan t\u1edbi th\u1eadn, b\u1ec7nh g\u00fat, th\u1ea5p kh\u1edbp hay c\u00e1c d\u1ea1ng n\u00e0o \u0111\u00f3 c\u1ee7a c\u00e1c t\u1ed5n th\u01b0\u01a1ng \u00e2m h\u1ed9 m\u1ea1n t\u00ednh (vulvodynia) n\u00f3i chung kh\u00f4ng n\u00ean d\u00f9ng c\u00e1c lo\u1ea1i th\u1ee9c \u0103n \u0111\u00f3.<\/p>\n

Ng\u01b0\u1ee3c l\u1ea1i, vi\u1ec7c cung c\u1ea5p canxi c\u00f9ng v\u1edbi c\u00e1c th\u1ee9c \u0103n gi\u00e0u ax\u00edt oxalic c\u00f3 th\u1ec3 l\u00e0m cho ax\u00edt n\u00e0y k\u1ebft t\u1ee7a trong ru\u1ed9t v\u00e0 l\u00e0m gi\u1ea3m m\u1ea1nh m\u1ee9c \u0111\u1ed9 oxalat \u0111\u01b0\u1ee3c c\u01a1 th\u1ec3 h\u1ea5p th\u1ee5 (trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p l\u00ean t\u1edbi 97%), K\u1ebft t\u1ee7a c\u1ee7a oxalat canxi trong th\u1eadn (\u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn nh\u01b0 l\u00e0 s\u1ecfi th\u1eadn) l\u00e0m ngh\u1ebdn \u0111\u01b0\u1eddng ti\u1ebft ni\u1ec7u.<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00f4ng th\u1ee9c h\u00f3a h\u1ecdc :\u00a0C2H2O4\u00a0. 2 H2O ho\u1eb7c (COOH)2\u00a0. 2 H2O ho\u1eb7c\u00a0C2H6O6 T\u00ean h\u00f3a h\u1ecdc :\u00a0Axit oxalic, Oxalic acid Xu\u1ea5t x\u1ee9:\u00a0Trung …<\/p>\n","protected":false},"featured_media":1287,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_cat":[39],"product_tag":[],"class_list":{"0":"post-1286","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-hoa-chat-xi-ma","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/vinachemistry.com\/vi\/wp-json\/wp\/v2\/product\/1286","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vinachemistry.com\/vi\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/vinachemistry.com\/vi\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/vinachemistry.com\/vi\/wp-json\/wp\/v2\/comments?post=1286"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vinachemistry.com\/vi\/wp-json\/wp\/v2\/media\/1287"}],"wp:attachment":[{"href":"https:\/\/vinachemistry.com\/vi\/wp-json\/wp\/v2\/media?parent=1286"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/vinachemistry.com\/vi\/wp-json\/wp\/v2\/product_cat?post=1286"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/vinachemistry.com\/vi\/wp-json\/wp\/v2\/product_tag?post=1286"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}