{"product_id":"5-mm-nmr-tubes-with-constriction-for-flame-sealing","title":"5 mm NMR tubes with constriction, for flame sealing","description":"\u003cdiv style=\"margin-bottom: 28px;\"\u003e\n\u003cdiv style=\"background: #002147; padding: 10px 20px; margin-bottom: 0;\"\u003e\u003ch3 style=\"margin: 0; font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 0.70em; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: #fff;\"\u003eWhat this tube is for\u003c\/h3\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding: 16px 20px; border: 1px solid #e4e8f0; border-top: none; font-family: Georgia, 'Times New Roman', serif; font-size: 0.95em; line-height: 1.65; color: #333;\"\u003e\n\u003cp\u003eA 5 mm NMR tube with a constriction: a narrowed neck a short way below the cap, where the glass can be melted shut with a torch. The 5 mm is the outer diameter of the tube (4.95 mm), the size that most NMR probes take. The length, 7 inches, is 178 mm. Deutero states that the constriction allows quick and easy flame sealing of the tube, even for inexperienced users.\u003c\/p\u003e\n\u003cp\u003eA flame-sealed tube keeps the sample closed for good. Typical uses are samples that must not meet air or moisture, volatile samples, and reference samples that are kept for a long time.\u003c\/p\u003e\n\u003cp\u003eA sealed tube cannot release pressure: keep this in mind before you heat the sample.\u003c\/p\u003e\n\u003cp\u003eIf you need to open and close the tube again, see the \u003ca href=\"\/products\/deutero-nmr-tubes-with-ptfe-valve-5-mm\"\u003eNMR tubes with PTFE valve\u003c\/a\u003e or the \u003ca href=\"\/products\/5-mm-screw-cap-nmr-tubes-closed-or-septum-top\"\u003escrew-cap NMR tubes\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv style=\"margin-bottom: 28px;\"\u003e\n\u003cdiv style=\"background: #002147; padding: 10px 20px; margin-bottom: 0;\"\u003e\u003ch3 style=\"margin: 0; font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 0.70em; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: #fff;\"\u003eYour choices\u003c\/h3\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding: 16px 20px; border: 1px solid #e4e8f0; border-top: none; font-family: Georgia, 'Times New Roman', serif; font-size: 0.95em; line-height: 1.65; color: #333;\"\u003e\n\u003cp\u003e\u003cstrong\u003eGrade: 300, 400 or 500 MHz.\u003c\/strong\u003e The grade tells you how straight and round the tube is. Choose the grade of your spectrometer, or a higher one.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLength: 7 inches.\u003c\/strong\u003e The tubes are 7 inches (178 mm) long as supplied. After sealing they are shorter, because the top above the neck comes off.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePack.\u003c\/strong\u003e Packs of 5, each tube with its cap.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe most common choice is \u003cspan style=\"white-space: nowrap;\"\u003eboroct500-5-7\u003c\/span\u003e:\u003c\/strong\u003e the 500 MHz grade.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv style=\"margin-bottom: 28px;\"\u003e\n\u003cdiv style=\"background: #002147; padding: 10px 20px; margin-bottom: 0;\"\u003e\u003ch3 style=\"margin: 0; font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 0.70em; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: #fff;\"\u003eTechnical specifications\u003c\/h3\u003e\u003c\/div\u003e\n\u003ctable style=\"width: 100%; table-layout: auto; border-collapse: collapse; font-size: 0.95em; border: 1px solid #e4e8f0; border-top: none; font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"padding: 9px 10px; text-align: left; font-weight: 600; color: #002147; background: #f7f8fb; border-bottom: 1px solid #e4e8f0;\"\u003eItem no.\u003c\/th\u003e\n\u003cth style=\"padding: 9px 10px; text-align: left; font-weight: 600; color: #002147; background: #f7f8fb; border-bottom: 1px solid #e4e8f0;\"\u003eGrade\u003c\/th\u003e\n\u003cth style=\"padding: 9px 10px; text-align: left; font-weight: 600; color: #002147; background: #f7f8fb; border-bottom: 1px solid #e4e8f0;\"\u003eOD (mm)\u003c\/th\u003e\n\u003cth style=\"padding: 9px 10px; text-align: left; font-weight: 600; color: #002147; background: #f7f8fb; border-bottom: 1px solid #e4e8f0;\"\u003eConcen­tricity \/ camber (µm)\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 10px; border-bottom: 1px solid #e4e8f0; color: #002147; font-weight: 600;\"\u003e\u003cspan style=\"white-space: nowrap;\"\u003eboroct300-5-7\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 10px; border-bottom: 1px solid #e4e8f0; color: #333;\"\u003e300 MHz\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 10px; border-bottom: 1px solid #e4e8f0; color: #333;\"\u003e4.950 ± 0.020\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 10px; border-bottom: 1px solid #e4e8f0; color: #333;\"\u003e7 \/ 25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 10px; border-bottom: 1px solid #e4e8f0; color: #002147; font-weight: 600;\"\u003e\u003cspan style=\"white-space: nowrap;\"\u003eboroct400-5-7\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 10px; border-bottom: 1px solid #e4e8f0; color: #333;\"\u003e400 MHz\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 10px; border-bottom: 1px solid #e4e8f0; color: #333;\"\u003e4.950 ± 0.015\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 10px; border-bottom: 1px solid #e4e8f0; color: #333;\"\u003e7 \/ 25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #eef5fb;\"\u003e\n\u003ctd style=\"padding: 9px 10px; border-bottom: 1px solid #e4e8f0; color: #002147; font-weight: 600;\"\u003e\u003cspan style=\"white-space: nowrap;\"\u003eboroct500-5-7\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 10px; border-bottom: 1px solid #e4e8f0; color: #333;\"\u003e500 MHz\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 10px; border-bottom: 1px solid #e4e8f0; color: #333;\"\u003e4.950 ± 0.015\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 10px; border-bottom: 1px solid #e4e8f0; color: #333;\"\u003e5 \/ 13\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"padding: 12px 20px; border: 1px solid #e4e8f0; border-top: none; font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 0.9em; color: #333;\"\u003eAll tubes: Boro 5.1 glass, ASTM type 1 class B, wall 0.43 mm. 7 in (178 mm) as supplied. Packs of 5, caps included. Every Deutero tube is tested on Deutero’s in-house 500 MHz NMR spectrometer.\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv style=\"margin-bottom: 28px;\"\u003e\n\u003cdiv style=\"background: #002147; padding: 10px 20px; margin-bottom: 0;\"\u003e\u003ch3 style=\"margin: 0; font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 0.70em; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: #fff;\"\u003eManufacturer\u003c\/h3\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding: 14px 20px; border: 1px solid #e4e8f0; border-top: none; font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 0.95em; color: #333; display: flex; align-items: center; gap: 18px;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0954\/6357\/1793\/files\/deutero-logo.png?v=1793286803\" alt=\"Deutero GmbH, NMR Spectroscopy\" width=\"120\" height=\"49\" style=\"width: 120px; height: auto; flex: 0 0 auto;\"\u003e\u003cdiv\u003eMade by Deutero GmbH, Kastellaun, Germany. NorrChemica is an authorised distributor of Deutero GmbH.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv style=\"margin-bottom: 28px; background: #eef5fb; border-left: 4px solid #2392c4; padding: 16px 20px; font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\"\u003e\n\u003cdiv style=\"font-size: 0.70em; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: #002147; margin-bottom: 6px;\"\u003eNo spectrometer?\u003c\/div\u003e\n\u003cdiv style=\"font-size: 0.95em; color: #333; line-height: 1.5;\"\u003eSend us the sample and we run the NMR: ¹H, ¹³C, ¹⁹F, ³¹P and ¹¹B.\u003c\/div\u003e\n\u003ca href=\"\/pages\/nmr-service\" style=\"display: inline-block; margin-top: 10px; background: #002147; color: #fff; text-decoration: none; font-weight: 700; font-size: 0.9em; padding: 8px 16px; border-radius: 4px;\"\u003eSee the NMR analysis service →\u003c\/a\u003e\n\u003c\/div\u003e","brand":"Deutero","offers":[{"title":"boroct500-5-7 · 500 MHz · 7 in · pack of 5 · most common","offer_id":55661050593617,"sku":"boroct500-5-7","price":99.62,"currency_code":"EUR","in_stock":true},{"title":"boroct300-5-7 · 300 MHz · 7 in · pack of 5","offer_id":55661050528081,"sku":"boroct300-5-7","price":45.74,"currency_code":"EUR","in_stock":true},{"title":"boroct400-5-7 · 400 MHz · 7 in · pack of 5","offer_id":55661050560849,"sku":"boroct400-5-7","price":73.19,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0954\/6357\/1793\/files\/constriction-nmr-tube-drawing.png?v=1793847631","url":"https:\/\/www.norrchemica.com\/products\/5-mm-nmr-tubes-with-constriction-for-flame-sealing","provider":"NorrChemica","version":"1.0","type":"link"}