{"id":3483,"date":"2021-01-18T03:24:12","date_gmt":"2021-01-18T03:24:12","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=3483"},"modified":"2026-04-28T10:41:48","modified_gmt":"2026-04-28T10:41:48","slug":"properties-and-synthetic-routes-of-allantoin","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/nl\/properties-and-synthetic-routes-of-allantoin\/","title":{"rendered":"Eigenschappen en syntheseroutes van allanto\u00efne en zijn derivaten"},"content":{"rendered":"<h4 class=\"wp-block-heading\">Vanwege de brede toepassing is de vraag naar <strong><a href=\"https:\/\/longchangchemical.com\/nl\/product\/allantoin-cas-97-59-6\/\" target=\"_blank\" rel=\"noreferrer noopener\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">allanto\u00efne<\/span><\/a><\/strong> is van jaar tot jaar toegenomen. De chemische synthese van allanto\u00efne verscheen in de jaren 1940 in het buitenland. Maar het duurde tot het eind van de jaren 1970 en het begin van de jaren 1980 voordat Japan en West-Duitsland het in industri\u00eble productie namen. De ontwikkeling van de binnenlandse allanto\u00efnesynthese kwam relatief laat op gang en het onderzoek en de ontwikkeling begonnen aan het eind van de jaren zeventig. Op dit moment hebben slechts een paar binnenlandse bedrijven een proef- of massaproductie gerealiseerd. Omdat er maar weinig fabrikanten zijn, is de markt extreem krap. Door de speciale fysische en chemische eigenschappen van allanto\u00efne zijn er verschillende soorten allanto\u00efnederivaten die op grote schaal worden gebruikt. Tot op de dag van vandaag blijven allanto\u00efne en zijn derivaten de ontwikkeling sturen.<\/h4>\n\n<!-- lc-qa-start -->\n<p><strong>Quick answer:<\/strong> A practical additive decision starts with the exact defect: foam, poor wetting, craters, haze, or instability. The best product is usually the one that solves that defect with the safest compatibility window.<\/p>\n<!-- lc-qa-end -->\n\n\n\n\n\n\n<h4 class=\"wp-block-heading\"><strong><a href=\"https:\/\/longchangchemical.com\/nl\/product\/allantoin-cas-97-59-6\/\" target=\"_blank\" rel=\"noreferrer noopener\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">Allanto\u00efne<\/span><\/a><\/strong>De chemische naam is 1-urea-m-diazocene - [2,4]; Acetaldehyde Tetraaza cyclopentadiene; (2,5-dioxocene-4-m-diazopentyl) urea; 5-urea hydantoin enz. Het behoort tot de imidazool heterocyclische verbinding, moleculaire formule is C<sub>4<\/sub>H<sub>6<\/sub>N<sub>4<\/sub>O<sub>3<\/sub>Het moleculaire gewicht is 158,12 g\/mol. Allanto\u00efne is een kristal of kristallijn poeder met een kleur tussen kleurloos en wit, en het is geurloos en smaakloos. Het smeltpunt van allanto\u00efne ligt tussen 220 en 238 \u2103. Allanto\u00efne is onoplosbaar in water, alcohol, ether en chloroform, oplosbaar in heet water, verdunde ethanol en propaantriolen. De verzadigde waterige oplossing (0,6%) was licht zuur, pH =. 6. In een waterige oplossing van pH = 4 tot 9, blijft stabiel, en in een niet-waterig oplosmiddel en drogen lucht stabiel is, zelfs in de 80 ~ 90 \u2103 30 min onder warmte ook onveranderd gebleven.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">Maar het kan niet tegen hoge temperaturen (boven 100 \u2103), een sterke base, of een lange tijd van het koken en zonlicht. Allanto\u00efne heeft isomeren en de structuurformule is als volgt:<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"694\" height=\"168\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/1-1.png\" alt=\"\" class=\"wp-image-3484\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/1-1.png 694w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/1-1-300x73.png 300w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/1-1-600x145.png 600w\" sizes=\"(max-width: 694px) 100vw, 694px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Het geconjugeerde alcoholsysteem is de reden voor de vorming van zure groepen en kan de moleculen stabiliseren. Het bestaan van OH<sup>&#8211;<\/sup>&nbsp;kan bij sommige mensen de indruk wekken dat allanto\u00efne een binaire zuurverbinding is. Maar over het algemeen heeft de waterstof op C(4) een zeer lage activiteit en een zwakke dissociatieconstante. Het zuur op de positie van koolstof (2) is sterker, en de dissociatieconstante is 1,17 \u00d7 10<sup>-9<\/sup>. Daarom kan er maar \u00e9\u00e9n serie zouten gevormd worden, zure zouten of basische zouten. Daarom is allanto\u00efne een monobasische zuur-base amfotere verbinding. Er kunnen zowel alcohol- als ketonvormen bestaan. Als amfotere verbinding is allanto\u00efne niet alleen een basische verbinding, maar ook een zwak zuur en een zwakke base voor zure zoutverbindingen. Daarom kan allanto\u00efne metaalzouten en adducten vormen met veel stoffen. Deze metaalzouten en adducten behouden niet alleen de eigenschappen van allanto\u00efne zelf, maar verliezen ook niet de inherente eigenschappen van de toegevoegde stoffen. Hierna zullen we een aantal fysische en chemische eigenschappen van allanto\u00efne aluminiumverbindingen opnoemen als voorbeeld.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">Allanto\u00efne aluminiumverbindingen bieden een breed scala aan effectieve functies voor de behandeling van huidziekten. Omdat de convergentie van het aluminiumion en de ideale eigenschappen van allanto\u00efne volledig gecombineerd zijn. De aanwezigheid van allanto\u00efne verbetert het effect van aluminiumzout en elimineert de irritatie van sommige pati\u00ebnten met een allergie voor aluminiumzout. Dierproeven toonden ook aan dat allanto\u00efne aluminiumzout geen irritatie en allergie had. Verschillende veel voorkomende vormen zijn als volgt:<\/h4>\n\n\n\n<h3 class=\"wp-block-heading\">1. Alluminium dihydroxy allantoinaat<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Alluminium dihydroxy allantoinaat heeft als molecuulformule Al(OH)<sub>2<\/sub>C<sub>4<\/sub>H<sub>5<\/sub>N<sub>4<\/sub>O<sub>3<\/sub>. Het is een wit poeder, onoplosbaar in water en andere oplosmiddelen, zoals ethanol, ether en chloroform. De internationale handelsnaam is \"aldioxa\". De samenstelling van Alluminum dihydroxy allantoinate is als volgt: aluminiumoxide (22,0 \u00b1 5)%, allanto\u00efne (55,0 \u00b1 5)%, pH-waarde (4% suspensie) is 6-5,8.<\/h4>\n\n\n\n<h3 class=\"wp-block-heading\">2. Aluminium chlo rhydroxy allantoinaat prorylene glycol<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">De molecuulformule van alluminiumdihydroxyallantoinaat is [Al<sub>2<\/sub>(OH)<sub>4<\/sub>ClC<sub>4<\/sub>H<sub>5<\/sub>N<sub>4<\/sub>O<sub>3<\/sub>]C<sub>3<\/sub>H<sub>8<\/sub>O<sub>2<\/sub>. Het is een wit poeder, in moleculaire of gemodificeerde vorm, en wordt gebruikt als deodorant, bevochtigingsmiddel en adstringerend middel voor de huid.<\/h4>\n\n\n\n<h3 class=\"wp-block-heading\">3. Aluminiumchloorhydroxyallanto\u00efnaat<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">De formule van aluminiumchloorhydroxyallantoinaat is Al<sub>2<\/sub>(OH)<sub>4<\/sub>ClC<sub>4<\/sub>H<sub>5<\/sub>N<sub>4<\/sub>O<sub>3<\/sub>. Aluminiumchloorhydroxyallanto\u00efnaat is een zuiver wit poeder, oplosbaar in water, enigszins oplosbaar in ethanol, onoplosbaar in ether en chloorimitatie. De internationale handelsnaam van Aluminum chlorhy dro xy allantoinate is \"alcloxa\".De samenstelling is als volgt: Aluminiumoxide (28,0 \u00b1 3)%, allanto\u00efne (40,0 \u00b1 3)%, chloor (9,5 \u00b1 1,5)%, stikstof (14,2 \u00b1 1,5)%.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">Tegelijkertijd is de samenstelling van gemodificeerde chloroaluminum allanto\u00efne als volgt: Aluminiumoxide (45,61 \u00b1 2,0)%, allanto\u00efne (1,25 \u00b1 0,3)%, chloor (15,60 \u00b1 1,5). De pH-waarde van 10% oplossing van Aluminum chlorhy dro xy allantoinaat is ongeveer 4,3 .<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">Volgens de literatuur zijn de belangrijkste synthesemethoden voor allanto\u00efne de volgende:<\/h4>\n\n\n\n<h3 class=\"wp-block-heading\">1. Reactie van urinezuur met kaliumpermanganaat<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Urinezuur en kaliumpermanganaat worden geoxideerd in een alkalisch medium en de producten worden gedecarboxyleerd met azijnzuur. De oxidatiemiddelen kunnen ook looddioxide, kaliumferricyanide, zuurstof, ozon, mangaandioxide, waterstofperoxide, enz. zijn. Het reactieproces verloopt als volgt:<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">Eerst de oxidatiereactie. Urinezuur en kaliumpermanganaat reageren.<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"525\" height=\"174\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/2-1.png\" alt=\"\" class=\"wp-image-3485\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/2-1.png 525w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/2-1-300x99.png 300w\" sizes=\"(max-width: 525px) 100vw, 525px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Daarna krijgt de decarboxyleringsringopeningsreactie het eindproduct.<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"778\" height=\"159\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/3-1.png\" alt=\"\" class=\"wp-image-3486\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/3-1.png 778w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/3-1-300x61.png 300w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/3-1-768x157.png 768w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/3-1-600x123.png 600w\" sizes=\"(max-width: 778px) 100vw, 778px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Dit is de vroegste procesroute, die beperkt is tot productie in kleine batches vanwege het tekort aan grondstoffen, de hoge prijs, het grote volume van de apparatuur en de hoge kosten.<\/h4>\n\n\n\n<h3 class=\"wp-block-heading\">2. Elektrolytische oxidatie van lithiumuraat<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Allanto\u00efne werd gesynthetiseerd door condensatie van glyoxylzuur en ureum onder elektriciteit.<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"425\" height=\"133\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/4-1.png\" alt=\"\" class=\"wp-image-3487\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/4-1.png 425w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/4-1-300x94.png 300w\" sizes=\"(max-width: 425px) 100vw, 425px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Hoewel de opbrengst van deze methode iets hoger is dan die van de urinezuuroxidatiemethode, heeft ze ook de bovenstaande problemen en wordt ze minder industrieel toegepast.<\/h4>\n\n\n\n<h3 class=\"wp-block-heading\">3. Elektrolytische oxidatie van oxaalzuur<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Dit is een nieuw proces dat de afgelopen jaren is ontwikkeld en deze productielijn is in China gevestigd. De grondstoffen zijn gemakkelijk te verkrijgen, maar het energieverbruik is hoog. Volgens de literatuur is het proces niet volwassen en moet het verbeterd worden.<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"651\" height=\"199\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/1.png\" alt=\"\" class=\"wp-image-3976\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/1.png 651w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/1-300x92.png 300w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/1-600x183.png 600w\" sizes=\"(max-width: 651px) 100vw, 651px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">4. Oxidatie van glyoxal<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Omdat glyoxylzuur kan worden bereid door gedeeltelijke oxidatie van glyoxal en de procesomstandigheden mild zijn, wordt deze synthetische route vaak gebruikt in de industrie. Bij deze methode wordt echter salpeterzuur gebruikt om te oxideren, wat ernstige milieuvervuiling veroorzaakt.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">Eerst gedeeltelijke oxidatie van glyoxal om glyoxylzuur te krijgen.<\/h4>\n\n\n\n<h2 class=\"wp-block-heading\"><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"552\" height=\"60\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/2.png\" alt=\"\" class=\"wp-image-3977\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/2.png 552w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/2-300x33.png 300w\" sizes=\"(max-width: 552px) 100vw, 552px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Het heeft twee nevenreacties die hieronder staan, dus de opbrengst van deze manier om glyoxylzuur te krijgen is ongeveer 83%.<\/h4>\n\n\n\n<h2 class=\"wp-block-heading\"><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"462\" height=\"131\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/3.png\" alt=\"\" class=\"wp-image-3978\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/3.png 462w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/3-300x85.png 300w\" sizes=\"(max-width: 462px) 100vw, 462px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Vervolgens wordt allanto\u00efne gesynthetiseerd door condensatie van glyoxylzuur en ureum onder invloed van verhitting en zuur.<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"656\" height=\"145\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/4.png\" alt=\"\" class=\"wp-image-3979\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/4.png 656w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/4-300x66.png 300w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/4-600x133.png 600w\" sizes=\"(max-width: 656px) 100vw, 656px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">De omzetting van glyoxylzuur op deze manier is 52% \uff5e 58%. Volgens alle reacties, geteld met glyoxal, is de opbrengst van allanto\u00efne 38% - 40% van de theoretische waarde.<\/h4>\n\n\n\n<h3 class=\"wp-block-heading\">5. Reactie van ureum met dichloorazijnzuur<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Het wordt bereid door verhitting van 2 mol ureum en 1 mol dichloorazijnzuur. Het reactieproces verloopt als volgt:<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"689\" height=\"270\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/5.png\" alt=\"\" class=\"wp-image-3980\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/5.png 689w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/5-300x118.png 300w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/5-600x235.png 600w\" sizes=\"(max-width: 689px) 100vw, 689px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">In 1930 meldde een Amerikaans patent dat allanto\u00efne kon worden geproduceerd in ethyleenglycol bij 120 \u2103 gedurende 4 uur, maar de opbrengst was laag. De totale opbrengst van allanto\u00efne-p-dichloorazijnzuur kan oplopen tot 30,3%. Sommige onderzoekers uit China hebben het proces bestudeerd en de totale opbrengst van allanto\u00efne meer dan 40% gemaakt. De hele routine is als volgt.<\/h4>\n\n\n\n<h2 class=\"wp-block-heading\"><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"638\" height=\"221\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/6.png\" alt=\"\" class=\"wp-image-3981\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/6.png 638w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/6-300x104.png 300w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/6-600x208.png 600w\" sizes=\"(max-width: 638px) 100vw, 638px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Op dit moment zijn andere manieren van technologische ontwikkeling en onderzoek ook zeer actief, in een poging om succes te boeken tegen lagere kosten, zoals de acetyleenmethode, kooldioxide, koolmonoxide en andere methoden voor het terugwinnen van afvalgassen met een hoog gehalte. Tot nu toe is er echter nog geen verslag in productie genomen. Als belangrijk industrieel product heeft allanto\u00efne meer synthetisch onderzoek nodig.<\/h4>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"block-b4c0eeaf-7d48-4b9c-9bec-7357c3ccc6ad\"><strong><a href=\"https:\/\/longchangchemical.com\/nl\/product\/allantoin-cas-97-59-6\/\" target=\"_blank\" rel=\"noreferrer noopener\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">waar kan ik allanto\u00efne kopen?<\/span><\/a><\/strong><\/h2>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"block-ec1c94cf-d71a-405b-bc1c-0f668efbb6ff\"><strong>Longchang Chemical is gespecialiseerd in de productie en levering van Allanto\u00efne CAS 97-59-6. Wij zullen gewoonlijk binnen 24 uren contact met u opnemen. U kon me info@longchangchemical.com tijdens werkuren (8:30 am to 6:00 pm UTC+8 Mon.~Sat.) ook e-mailen of de website live chat gebruiken om snel antwoord te krijgen.<\/strong><\/h4>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"block-7edc1230-2340-4d50-bcbf-7af68000beef\"><strong>Dit artikel is geschreven door Longchang Chemical R&amp;D Department. Als u het wilt kopi\u00ebren en herdrukken, geef dan de bron aan<\/strong>.<\/h4>\n\n\n<!-- lc-commercial-start -->\n<h2>A practical selection checklist for wetting, leveling, and defoaming additives<\/h2>\n<p>Additive selection is usually most effective when the team defines the defect first and then screens compatibility, dosage range, and process stage. That is often much more reliable than choosing only by chemistry family or by a single dramatic lab result.<\/p>\n<ul>\n<li><strong>Start from the defect, not the additive name:<\/strong> wetting loss, crater, microfoam, and instability often need different solutions even inside the same formula.<\/li>\n<li><strong>Check compatibility at the intended dosage:<\/strong> the strongest additive can still be the wrong commercial choice if it narrows the process window too much.<\/li>\n<li><strong>Review the stage of use:<\/strong> some products are most useful during grind, while others matter more during let-down, filling, or final application.<\/li>\n<li><strong>Balance cure or film quality with defect control:<\/strong> the right additive fixes the problem without sacrificing adhesion, gloss, or appearance.<\/li>\n<\/ul>\n<h3>Recommended product references<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/nl\/product\/chlumiaf-094\/\">CHLUMIAF 094<\/a>:<\/strong> A balanced defoamer reference for waterborne coatings and many general foam-control screens.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/nl\/product\/chlumiaf-3062\/\">CHLUMIAF 3062<\/a>:<\/strong> Useful when printing-ink and UV-ink compatibility matter in the defoaming screen.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/nl\/product\/chlumiaf-3037\/\">CHLUMIAF 3037<\/a>:<\/strong> A stronger process-defoaming option when persistent foam survives harsher conditions.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/nl\/product\/chlumiwe-3280\/\">CHLUMIWE 3280<\/a>:<\/strong> A strong wetting-agent reference for inks, coatings, and difficult substrate wetting.<\/li>\n<\/ul>\n<h3>FAQ for buyers and formulators<\/h3>\n<p><strong>Why does an additive that looks powerful in a beaker sometimes fail in production?<\/strong><br \/>Because shear, temperature, substrate, and the full formula can all change the way the additive performs under real process conditions.<\/p>\n<p><strong>Should the most aggressive additive always be preferred?<\/strong><br \/>Not usually. The best additive is the one that solves the real defect while preserving the broadest safe operating window.<\/p>\n<!-- lc-commercial-end -->","protected":false},"excerpt":{"rendered":"<p>Due to its wide application, the demand for allantoin has been increasing year by year . The chemical synthesis method of allantoin appeared in foreign countries in the 1940s. But<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[105],"tags":[],"class_list":["post-3483","post","type-post","status-publish","format-standard","hentry","category-medicine-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Properties and synthetic routes of allantoin and its derivatives - Longchang Chemical Co., Ltd.<\/title>\n<meta name=\"description\" content=\"Properties and synthetic routes of allantoin and its derivatives. Longchang Chemical specializes in the production and supply of Allantoin CAS 97-59-6. 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