Rigorous % v/v dilution for ethanol and isopropanol. Ethanol uses the OIML R22
Wagenbreth-Blanke polynomial (−20 °C to +40 °C). Isopropanol uses a 45-term bivariate
polynomial ρ(p, t) fitted by least squares to Perry's 6th Ed. tables, valid 15–40 °C.
Volume contraction is implicitly handled via mixture densities throughout.
IPA polynomial range: 15–40 °C only. This calculator replaces the Perry
table lookup for isopropanol with an 8th-degree/4th-degree bivariate polynomial
(R² = 0.9999946, max residual 0.58 kg/m³). The polynomial is fitted to
the same Perry source data as the original calculator. It is not an independent
data source. Reference and ambient temperatures for IPA are restricted to 15–40 °C.
Use the original calculator for IPA at 0 °C.
01 — Alcohol type
02 — Known quantity
03 — Concentrated alcohol properties
98.0%
04 — Target concentration & ambient temperature
Results reported at this temperature (15–40 °C for IPA polynomial)