Na
metal· Na
Sodium (Na) is a soft, highly reactive alkali metal belonging to Group 1 of the periodic table. It is rarely used in bulk form for structural applications due to its extreme reactivity with moisture and oxygen, but instead serves critical roles in chemical synthesis, heat transfer systems, and specialized metallurgical processes. Engineers select sodium primarily for its exceptional thermal conductivity and low density in niche applications such as liquid-metal cooling systems in fast breeder reactors, and as a reducing agent or catalyst in industrial chemistry rather than as a conventional engineering material.
liquid metal coolant (nuclear reactors)chemical synthesis and reductionmetallurgical alloying agentspecialized heat transfer systemslaboratory and research applicationssodium-vapor lamps (historical)
Compliance & Regulations
?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 8.736 | GPa | — | ||
| ↳ | 7.730 | GPa | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.7005 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | Pa | — | ||
Poisson's Ratio(ν)2 entries | 0.3230 | - | — | ||
| ↳ | 0.3600 | - | — | ||
Shear Modulus(G)2 entries | 3.507 | GPa | — | ||
| ↳ | 3.860 | GPa | — |
N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form / heat treatment / basis.
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 1.005 | kg/m³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 0.000 | eV | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Seebeck Coefficient(S) | 119.3 | µV/K | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf) | 0.03589 | eV/atom | — |
Verified Unverified Low confidence (<80%) Link to source
Regulatory Screening
Environmental
Export Control
RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.