# Sodium chloride (data page)

This page provides supplementary chemical data on sodium chloride.

## Material safety data sheet

The handling of this chemical may incur notable safety precautions. It is highly recommended that you seek the material safety data sheet (MSDS) for this chemical from a reliable source such as eChemPortal, and follow its direction.

## Structure and properties

Structure and properties :
| Index of refraction, n$_D$ | 1.5442 |
| Abbe number | ? |
| Dielectric constant, | 6.12 at 17–22 °C |
| Bond strength | ? |
| Bond length | ? |
| Bond angle | ? |
| Magnetic susceptibility | −30.3×10$^{−6}$ cgs |

## Thermodynamic properties

Phase behavior :
| Triple point | 1074 K (801 °C), 30 Pa |
| Critical point | 3900 K (3600 °C), 26×10$^6$ Pa |
| Std enthalpy change of fusion, Δ$_{fus}$H$^o$ | 27.95 kJ/mol (0.52 kJ/g) |
| Std entropy change of fusion, Δ$_{fus}$S$^o$ | 26.02 J/(mol·K) |
| Std enthalpy change of vaporization, Δ$_{vap}$H$^o$ | 130.05 @ T-Boiling kJ/mol |
| Std entropy change of vaporization, Δ$_{vap}$S$^o$ | ? J/(mol·K) |
| Solid properties ||
| Std enthalpy change of formation, Δ$_f$H$^o$$_{solid}$ | −411.12 kJ/mol |
| Standard molar entropy, S$^o$$_{solid}$ | 72 J/(mol·K) |
| Heat capacity, c$_p$ | 50 J/(mol·K) ; 0.853 J/(g·k) |
| Liquid properties ||
| Std enthalpy change of formation, Δ$_f$H$^o$$_{liquid}$ | −385.92 kJ/mol |
| Standard molar entropy, S$^o$$_{liquid}$ | 95.06 J/(mol·K) |
| Density | 1.549 g/cm$^3$, at 850 °C |
| Heat capacity, c$_p$ | ? J/(mol·K) |
| Boiling point | 1465 °C |
| Gas properties ||
| Std enthalpy change of formation, Δ$_f$H$^o$$_{gas}$ | −181.42 kJ/mol |
| Standard molar entropy, S$^o$$_{gas}$ | 229.79 J/(mol·K) |
| Heat capacity, c$_p$ | ? J/(mol·K) |

## Density data of aqueous solutions

Properties of water–NaCl mixtures :
| NaCl, wt% | T$_{eq}$, °C | ρ, g/cm$^3$ | n | η, mPa·s |
| 0 | 0 | 0.99984 | 1.333 | 1.002 |
| 0.5 | −0.3 | 1.0018 | 1.3339 | 1.011 |
| 1 | −0.59 | 1.0053 | 1.3347 | 1.02 |
| 2 | −1.19 | 1.0125 | 1.3365 | 1.036 |
| 3 | −1.79 | 1.0196 | 1.3383 | 1.052 |
| 4 | −2.41 | 1.0268 | 1.34 | 1.068 |
| 5 | −3.05 | 1.034 | 1.3418 | 1.085 |
| 6 | −3.7 | 1.0413 | 1.3435 | 1.104 |
| 7 | −4.38 | 1.0486 | 1.3453 | 1.124 |
| 8 | −5.08 | 1.0559 | 1.347 | 1.145 |
| 9 | −5.81 | 1.0633 | 1.3488 | 1.168 |
| 10 | −6.56 | 1.0707 | 1.3505 | 1.193 |
| 12 | −8.18 | 1.0857 | 1.3541 | 1.25 |
| 14 | −9.94 | 1.1008 | 1.3576 | 1.317 |
| 16 | −11.89 | 1.1162 | 1.3612 | 1.388 |
| 18 | −14.04 | 1.1319 | 1.3648 | 1.463 |
| 20 | −16.46 | 1.1478 | 1.3684 | 1.557 |
| 22 | −19.18 | 1.164 | 1.3721 | 1.676 |
| 23.3 | −21.1 | | | |
| 23.7 | −17.3 | | | |
| 24.9 | −11.1 | | | |
| 26.1 | −2.7 | | | |
| 26.28 | 0 | | | |
| 26.32 | 10 | | | |
| 26.41 | 20 | | | |
| 26.45 | 25 | | | |
| 26.52 | 30 | | | |
| 26.67 | 40 | | | |
| 26.84 | 50 | | | |
| 27.03 | 60 | | | |
| 27.25 | 70 | | | |
| 27.5 | 80 | | | |
| 27.78 | 90 | | | |
| 28.05 | 100 | | | |
Note: ρ is density, n is refractive index at 589 nm, and η is viscosity, all at 20 °C; T$_{eq}$ is the equilibrium temperature between two phases: ice/liquid solution for T$_{eq}$ < 0–0.1 °C and NaCl/liquid solution for T$_{eq}$ above 0.1 °C.

## Spectral data

UV-Vis :
| λ$_{max}$ | ? nm |
| Extinction coefficient, ε | ? |
| IR ||
| Major absorption bands | ? cm$^{−1}$ |
| NMR ||
| Proton NMR | |
| Carbon-13 NMR | |
| Other NMR data | |
| MS ||
| Masses of main fragments | |
* view
* Except where noted otherwise, data relate to Standard temperature and pressure.
* Reliability of data general note.