Where can I buy 5 mm NMR tubes with constriction, for flame sealing in Europe?

5 mm NMR tubes with constriction, for flame sealing is available from NorrChemica (Helsinki, Finland) with DDP worldwide shipping. EU and UK delivery in 2-5 business days. All orders include batch-specific CoA and SDS.

What is the CAS number of 5 mm NMR tubes with constriction, for flame sealing?

5 mm NMR tubes with constriction, for flame sealing has CAS number and is supplied at purity.

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Deutero

5 mm NMR tubes with constriction, for flame sealing

Pack sizes & prices

Pack sizes and prices
Pack size	Excl. VAT	Add to cart
boroct500-5-7 · 500 MHz · 7 in · pack of 5 · most common	€79,38€99,62 incl. VAT
boroct300-5-7 · 300 MHz · 7 in · pack of 5	€36,45€45,74 incl. VAT
boroct400-5-7 · 400 MHz · 7 in · pack of 5	€58,32€73,19 incl. VAT

Prices are shown without VAT. The price in the box includes VAT at 25.5% for Finland. Shipping calculated at checkout.Free shipping on orders above €250 incl. VAT. For businesses in other EU countries that give a VAT number, the limit is €250 excl. VAT.

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What this tube is for

A 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.

A 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.

A sealed tube cannot release pressure: keep this in mind before you heat the sample.

If you need to open and close the tube again, see the NMR tubes with PTFE valve or the screw-cap NMR tubes.

Your choices

Grade: 300, 400 or 500 MHz. The grade tells you how straight and round the tube is. Choose the grade of your spectrometer, or a higher one.

Length: 7 inches. The tubes are 7 inches (178 mm) long as supplied. After sealing they are shorter, because the top above the neck comes off.

Pack. Packs of 5, each tube with its cap.

The most common choice is boroct500-5-7: the 500 MHz grade.

Technical specifications

Item no.	Grade	OD (mm)	Concentricity / camber (µm)
boroct300-5-7	300 MHz	4.950 ± 0.020	7 / 25
boroct400-5-7	400 MHz	4.950 ± 0.015	7 / 25
boroct500-5-7	500 MHz	4.950 ± 0.015	5 / 13

All 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.