2,6-Di-tert-butyl-4-methylphenol

Formula：C15H240

Mol. Weight：220.35

CAS No.：128-37-0

Storage Temperature：20℃±4℃

Storage and handling The RM should be stored in the original sealed bottle at the temperatur given above.After use the bottle should be tightly closed and protected from moisture.

Purity：98.81% (g/g)

Expanded Uncertainty U= 0.84% (g/g)

The uncertainty of this standard is alauiated in accordance with the ISO 17034 and EURACHEM/CTAC Guide.Quantifying Uncertainty in Analytical Measurement, Second Edition. The expandeduncertainty is U(exp) = u(RM)x k where k is the coverage factor at the 95% confidence level (k=2).Uncertainty u(RM) is based on the combination of the uncertainties associated with each individualoperation involved in the analysis of the product： u(RM) =√u(char)²+ u(bb)²+ u(lts)²+ u(sts)²;u(char) is the uncertainty of purity determination; u(bb) uncertainty of homogeneity test; u(ts) uncertaintyof stability test long-term; ulsts)uncetainty of stability test short-term. U(lts) and u(sts) are not induded in the calculation as the stability! sta tement is based on real evidence opposed to simulation.

Minimum sample： 1 mg is recommended as the minimal sample amount If less materialis used,it is recommended to increase the certified uncertainty by a factor of two for half sample and a factor offour for a quarter of sample.

Intended use： Use this RM as Calibrent for chromatography or any other analytical technique.

Analytlal Data

Traceability of chromatography： To the lintemational System of Units (SI).

Instrument：GC/FID

Detection：FID

Column：Optima-5MS, 0.25 μm, 0.25 mm

Inj-Vol.：1 μl

Flow：1.0 ml/min

RetTime：14.21min

lnjector：280℃

Initial Temp：60℃ for 5 min

End Temp：280℃ for 1 min

Gradient：15℃/min

Comment

Traceabillty： The balances used are caibrated with weights traceable to the national standards (DKD).

Calibrated class A glassware is used for voumetric measurements.

Certificate Revision 1

Water Content： 0.56% (g/g) by Kalr-Fischer -Tieration (U(exp) = 0.19% (g/g)).

No chromatogram available.

ldentity： EA, NMR, RT, MS，IR

Attachment: Exemplany chromatogram of given method

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