Melting point standard 79-81°C
SIAL/01422 - analytical standard
Synonym: Naphthalene
CAS Number: 91-20-3
Empirical Formula (Hill Notation): C10H8
Molecular Weight: 128.17
EC Number: 202-049-5
MDL Number: MFCD00001742
Linear Formula: C10H8
Product Type: Chemical
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material. This image depicts SKU: 01422-1G
| application(s) | food and beverages pharmaceutical |
| autoignition temp. | 978 °F |
| bp | 218 °C (lit.) |
| expl. lim. | 5.9 % |
| grade | analytical standard |
| InChI | 1S/C10H8/c1-2-6-10-8-4-3- |
| InChI key | UFWIBTONFRDIAS-UHFFFAOYSA |
| mp | 79-81 °C (±0.3°C) |
| 80-82 °C (lit.) | |
| Quality Level | 100  |
| shelf life | limited shelf life, expiry date on the label |
| SMILES string | c1ccc2ccccc2c1 |
| vapor density | 4.4 (vs air) |
| vapor pressure | 0.03 mmHg ( 25 °C) |
| Application: | Naphthalene melting point standard 79-81 °C is an analytical standard used to calibrate melting point instruments, operating in the thermodynamic mode of analysis. It′s also applicable in R&D labs for chemical quality control (QC) and quality assurance (QA) to identify solid crystalline substances and to check their purity. Additionally, this mp standard is also used as a temperature calibration standard in thermal studies. |
| Features and Benefits: | • Melting point calibration standard traceable to primary standards (LGC, London) • Grade: Analytical Standard • Standard deviation up to ± 0.3 °C • Provided with certificates of analysis and safety data sheet |
| General description: | Melting point standard 79-81 °C, naphthalene is a non-polar hydrocarbon for use in the characterization of pure chemicals and pharmaceutical compounds. The melting point value is determined with an average of 6 to 12 measurements using a Büchi B-545 instrument that is calibrated against primary standards. |
| Symbol |     GHS02,GHS07,GHS08,GHS09 |
| Signal word | Warning |
| Hazard statements | H228 - H302 - H351 - H410 |
| Precautionary statements | P201 - P210 - P273 - P301 + P312 + P330 - P308 + P313 |
| Hazard Codes | Xn,N |
| Risk Statements | 22-40-50/53 |
| Safety Statements | 36/37-46-60-61 |
| RIDADR | UN1334 - class 4.1 - PG 3 - Naphthalene, crude |
| WGK Germany | WGK 3 |
| Flash Point(F) | 173.3 °F - closed cup |
| Flash Point(C) | 78.5 °C - closed cup |
| bp | 218 °C (lit.) |
| mp | 79-81 °C (±0.3°C); 80-82 °C (lit.) |
| UNSPSC | 20121904 |