Zinc chloride · ZnCl2
Zinc chloride (ZnCl2) is a salt; this page gives computed density for aqueous solutions from 5–50 wt% and 15–70 °C.
Values are computed from the Laliberté (2009) aqueous-electrolyte correlation and tabulated over 5–50 wt% and 15–70 °C.
- Also known as
- Zinc dichloride, Butter of zinc
- CAS number
- 7646-85-7
- Tabulated range
- 5–50 wt% · 15–70 °C
- Properties
- Density · Specific gravity · Degrees Baumé
- Density
- 1185.2kg/m³
- Density
- 1.1852g/cm³
- Specific gravity
- 1.187
- °Baumé
- 22.9heavy
Read a value at any point
Move the sliders to interpolate between the tabulated grid points. The readout and chart never go outside the validated 5–50 wt% and 15–70 °C range, and every number is interpolated from the committed table below — nothing is computed from a chemistry model in your browser.
Values are interpolated between the tabulated grid points below — sliders stay within the validated 5–50 wt% and 15–70 °C range.
- Density
- 1269.0 kg/m³
- Density
- 1.2690 g/cm³
- Specific gravity
- 1.271
- °Baumé (heavy)
- 30.9
What the numbers tell you
At 20 wt% and 20 °C, aqueous zinc chloride has a density of about 1185 kg/m³ (1.185 g/cm³) — roughly 1.19× the density of water. That difference carries straight into volume-to-mass conversions and pump and pipe sizing.
A few working strengths
Properties at 20 °C for a handful of concentrations in everyday use, read from the committed grid (interpolated between tabulated points where a grade falls between them). The full table follows below.
| wt% ZnCl2 | °C | Density kg/m³ | SG | °Baumé |
|---|---|---|---|---|
| 20 | 20 | 1185.2 | 1.187 | 22.9 |
| 30 | 20 | 1290.8 | 1.293 | 32.9 |
| 40 | 20 | 1413.1 | 1.416 | 42.6 |
| 50 | 20 | 1558.1 | 1.561 | 52.1 |
Where the numbers come from
Every value on this page is computed by a deterministic model — none is entered by hand. The generating method and the references it is checked against:
- ▸Laliberte, M. (2009). A Model for Calculating the Heat Capacity of Aqueous Solutions, with Updated Density and Viscosity Data. J. Chem. Eng. Data 54(6), 1725-1760. doi:10.1021/je8008123
- ▸Perry's Chemical Engineers' Handbook, 7th ed. (Perry & Green) - Table 2-105 Zinc Chloride density, from International Critical Tables, Vol. III, p. 64
- ▸CRC Handbook of Chemistry and Physics - Aqueous Solubility of Inorganic Compounds at Various Temperatures (solubility bounds for the tabulated range)
Model: thermo==0.4.0 (chemicals==1.3.0) - Laliberte 2009 electrolyte correlation · Generated 2026-06-07
The committed data file for this page is published as JSON on GitHub under CC BY 4.0.
Checked against a cited value
The model is cross-checked at one independently cited reference point. The page is published only because this check passes.
| Property / point | Density · 20 wt% · 20 °C |
| Cited reference value | 1186.6 kg/m3 |
| Model computed | 1185.16 kg/m3 |
| Error vs reference | 0.121% (tolerance 1%) |
Perry's Chemical Engineers' Handbook, 7th ed. (from International Critical Tables). Perry, R.H. & Green, D.W. (eds.), Perry's Chemical Engineers' Handbook, 7th ed., Table 2-105 Zinc Chloride (ZnCl2) (data from International Critical Tables, Vol. III, p. 64): 20 wt% ZnCl2 at 20 degC = 1.1866 g/cm3.
Every tabulated point
Rows are temperature (°C); columns are concentration (wt% ZnCl2). Read the cell at the intersection. Specific gravity is density divided by the model water reference of 998.2 kg/m³ at 20 °C.
| °C \ wt% | 5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 |
|---|---|---|---|---|---|---|---|---|---|---|
| 15 | 1046.2 | 1092.2 | 1138.9 | 1187.5 | 1238.8 | 1293.5 | 1352.4 | 1416.1 | 1485.4 | 1561.3 |
| 20 | 1044.8 | 1090.4 | 1136.8 | 1185.2 | 1236.3 | 1290.8 | 1349.5 | 1413.1 | 1482.3 | 1558.1 |
| 25 | 1043.1 | 1088.3 | 1134.4 | 1182.6 | 1233.5 | 1287.8 | 1346.4 | 1409.8 | 1478.9 | 1554.6 |
| 30 | 1041.2 | 1086.0 | 1131.8 | 1179.7 | 1230.4 | 1284.6 | 1343.0 | 1406.3 | 1475.3 | 1550.9 |
| 35 | 1039.0 | 1083.5 | 1129.0 | 1176.6 | 1227.2 | 1281.2 | 1339.4 | 1402.6 | 1471.4 | 1546.9 |
| 40 | 1036.7 | 1080.7 | 1126.0 | 1173.4 | 1223.7 | 1277.6 | 1335.6 | 1398.7 | 1467.4 | 1542.8 |
| 45 | 1034.2 | 1077.8 | 1122.8 | 1169.9 | 1220.1 | 1273.7 | 1331.7 | 1394.6 | 1463.2 | 1538.5 |
| 50 | 1031.5 | 1074.8 | 1119.4 | 1166.3 | 1216.3 | 1269.8 | 1327.6 | 1390.3 | 1458.9 | 1534.1 |
| 55 | 1028.6 | 1071.5 | 1115.9 | 1162.6 | 1212.3 | 1265.7 | 1323.3 | 1385.9 | 1454.4 | 1529.6 |
| 60 | 1025.6 | 1068.1 | 1112.2 | 1158.7 | 1208.2 | 1261.4 | 1318.9 | 1381.4 | 1449.8 | 1524.9 |
| 65 | 1022.4 | 1064.6 | 1108.4 | 1154.7 | 1204.0 | 1257.0 | 1314.4 | 1376.8 | 1445.0 | 1520.1 |
| 70 | 1019.1 | 1061.0 | 1104.5 | 1150.5 | 1199.6 | 1252.5 | 1309.7 | 1372.0 | 1440.2 | 1515.1 |
Zinc chloride solution properties at 25 °C
At 25 °C, 20 wt% zinc chloride has a density of about 1182.6 kg/m³. At 25 °C, 40 wt% zinc chloride has a density of about 1409.8 kg/m³. At 25 °C, 50 wt% zinc chloride has a density of about 1554.6 kg/m³.
Before you use these numbers
- ▸Laliberte (2009) aqueous-electrolyte correlation for ZnCl2-water, density only. Tabulated for 5-50 wt% over 15-70 degC. Zinc chloride is extremely soluble (saturation is about 79 wt% at 20 degC), so the 50 wt% ceiling is well below saturation; it is held there by the upper bound of the correlation's fitted density data. Viscosity and heat capacity are not tabulated: the correlation carries no heat-capacity coefficients for zinc chloride and its viscosity data covers only a single temperature, so both are omitted rather than approximated. Zinc chloride solutions are commonly traded on the heavy Baume scale, so degrees Baume are shown. Concentrations are ZnCl2 by mass. Values are for preliminary design; verify against vendor data for critical service.
- ▸Values are tabulated only inside the 5–50 wt% and 15–70 °C ranges shown; the correlation is not extrapolated beyond them here.
- ▸Figures are for a pure zinc chloride–water system. Commercial grades contain impurities (for example chloride in some caustic grades) that shift density and viscosity; check the supplier's data sheet for a specific product.
- ▸Use for preliminary design; verify for critical service.
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- Sodium bicarbonate NaHCO3
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