1.12939

Lactose Standard 5 %

Certified Reference Material for Karl Fischer Titration Aquastar^®

• Sinónimos: Lactose Standard 5 %, Milk sugar, Lactobiose
• Fórmula empírica (notación de Hill): C₁₂H₂₂O₁₁ · xH₂O
• Número de CAS: 10039-26-6
• Peso molecular: 342.30 (anhydrous basis)
• Código UNSPSC: 41116107
• Número índice de la CE: 200-559-2
• NACRES: NA.24

Propiedades

• grado: certified reference material
• Nivel de calidad: 300
• Agency: ISO 17025, 17034
• Línea del producto: Aquastar^®
• formulario: solid
• temp. de autoignición: 390 °C
• potencia: >10000 mg/kg LD₅₀, oral (Rat)
• técnicas: Karl-Fischer titration: suitable; titration: suitable
• pH: 4.0-6.5 (20 °C, 100 g/L in H₂O)
• mp: 202 °C
• densidad aparente: 500 kg/m³
• formato: neat
• temp. de almacenamiento: 15-25°C
• InChI: 1S/C12H22O11/c13-1-3-5(15)6(16)9(19)12(22-3)23-10-4(2-14)21-11(20)8(18)7(10)17/h3-20H,1-2H2/t3-,4-,5+,6+,7-,8-,9-,10-,11+,12+/m1/s1
• Clave InChI: GUBGYTABKSRVRQ-XLOQQCSPSA-N

Descripción

Descripción general

The lactose standard 5% is a solid standard, prepared gravimetrically from high-purity reagents. It is analyzed in an ISO/IEC 17025 and ISO 17034 accredited calibration laboratory. Its water content of 5% is measured by the coulometric Karl Fischer oven method at 150°C with an extraction time of 300 seconds, in accordance with ISO 760.

Please visit ISO certificates and Site Quality Self-Assessments to access the current certificates of accreditation.

Download your certificate at http://www.sigma-aldrich.com to view certified values, including uncertainty and expiry date.

Aplicación

Lactose standard 5% is used as a certified reference material (CRM) for both the coulometric and volumetric Karl Fischer water determinations, with or without the Karl Fischer oven. It is particularly suitable when the working medium used consists of solvents mixtures in which sodium tartrate dihydrate is slightly soluble. And it is used as an oven standard in the preferred temperature range of 140°C -190°C.

Características y beneficios

• Available in a secure plastic bottle with the material subjected to stability and homogeneity studies, following ISO 17034 and ISO Guide 35
• High-quality offering accurate and reliable results
• Accompanied with a comprehensive and batch-specific certificate of analysis (CoA) for an effective quality management system
• Measured and qualified in an ISO/IEC 17025 and ISO 17034 accredited laboratory

Envase

SKU-pack size numbers ending with a "3" are SmartChemicals with an RFID tag on the label for seamless data transfer to the instrument, e.g. xxxxxx1003 or xxxxxxx 4003. More information on www.sigmaaldrich.com/SmartChemicals.

Ligadura / enlace

Replaces: 1.12939.0010

Nota de análisis

Water content: 5.00 - 5.20 %
Measurement method: coulometric according Karl Fischer
extended measuring uncertainly: +/- 0.05 %

Información legal

AQUASTAR is a registered trademark of Merck KGaA, Darmstadt, Germany

Información de seguridad

• Código de clase de almacenamiento: 11 - Combustible Solids
• Clase de riesgo para el agua (WGK): WGK 2
• Punto de inflamabilidad (°F): Not applicable
• Punto de inflamabilidad (°C): Not applicable