IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

---

 Solubility System: Nitromethane with 1,2-Ethanediol-d2

---

Components:
   (1) Nitromethane; CH3NO2; [75-52-5]  NIST Chemistry WebBook for detail
   (2) 1,2-Ethanediol-d2; C2D2H4O2; [7782-39-0]  NIST Chemistry WebBook for detail

Original Measurements:
   Salvi, M.V.; Van Hook, W.A., J. Phys. Chem. 94, 7812 (1990).

Variables:
   Temperature = 313 K to 316 K
   Pressure = 313 K to 316 K

Prepared By:
   V. P. Sazonov

Experimental Remarks:

   UCST at P = 0.1 MPa is 315.04 K at x₁ = 0.642 (100 w₁ = 63.1, compiler).
(dT_c/dP) = (1.60 ± 0.04) · 10^-2 K · MPa^-1.

Experimental Data:   (Notes on the Nomenclature)
  

t/°C	T/K	Pressure [Mpa]	Mass Fraction w1 (compiler)	w1 Compiler Note	Mole Fraction x1	Comment(s)
39.959	313.109	0.1400	48.60	2	0.4981	Glycol-rich phase
39.959	313.109	0.1400	-	2	-	Nitromethane-rich phase
40.234	313.384	0.1100	-	2	-	Glycol-rich phase
40.234	313.384	0.1100	77.61	2	0.7844	Nitromethane-rich phase
40.501	313.651	0.1100	50.60	2	0.5181	Glycol-rich phase
40.501	313.651	0.1100	-	2	-	Nitromethane-rich phase
41.481	314.631	0.1200	-	2	-	Glycol-rich phase
41.481	314.631	0.1200	69.31	2	0.7041	Nitromethane-rich phase
41.553	314.703	0.5700	58.75	2	0.5992	Glycol-rich phase
41.553	314.703	0.5700	-	2	-	Nitromethane-rich phase
41.881	315.031	0.1200	-	2	-	Glycol-rich phase
41.881	315.031	0.1200	64.28	2	0.6539	Nitromethane-rich phase
40.000	313.150	2.510	48.60	2	0.4981	Glycol-rich phase
40.000	313.150	2.510	-	2	-	Nitromethane-rich phase
40.274	313.424	2.690	-	2	-	Glycol-rich phase
40.274	313.424	2.690	77.61	2	0.7844	Nitromethane-rich phase
40.544	313.694	2.520	50.60	2	0.5181	Glycol-rich phase
40.544	313.694	2.520	-	2	-	Nitromethane-rich phase
41.499	314.649	1.700	-	2	-	Glycol-rich phase
41.499	314.649	1.700	69.31	2	0.7041	Nitromethane-rich phase
41.921	315.071	2.500	62.41	2	0.6354	Glycol-rich phase
41.921	315.071	2.500	-	2	-	Nitromethane-rich phase
41.426	314.576	5.810	58.75	2	0.5992	Glycol-rich phase
41.426	314.576	5.810	-	2	-	Nitromethane-rich phase
41.554	314.704	5.030	-	2	-	Glycol-rich phase
41.554	314.704	5.030	69.31	2	0.7041	Nitromethane-rich phase
41.960	315.110	5.070	62.41	2	0.6354	Glycol-rich phase
41.960	315.110	5.070	-	2	-	Nitromethane-rich phase
40.062	313.212	10.11	48.60	2	0.4981	Glycol-rich phase
40.062	313.212	10.11	-	2	-	Nitromethane-rich phase
40.398	313.548	10.07	-	2	-	Glycol-rich phase
40.398	313.548	10.07	77.61	2	0.7844	Nitromethane-rich phase
40.598	313.748	9.880	50.60	2	0.5181	Glycol-rich phase
40.598	313.748	9.880	-	2	-	Nitromethane-rich phase
41.475	314.625	10.98	58.75	2	0.5992	Glycol-rich phase
41.475	314.625	10.98	-	2	-	Nitromethane-rich phase
41.610	314.760	10.10	-	2	-	Glycol-rich phase
41.610	314.760	10.10	69.31	2	0.7041	Nitromethane-rich phase
42.011	315.161	9.930	62.41	2	0.6354	Glycol-rich phase
42.011	315.161	9.930	-	2	-	Nitromethane-rich phase
40.150	313.300	14.74	48.60	2	0.4981	Glycol-rich phase
40.150	313.300	14.74	-	2	-	Nitromethane-rich phase
40.484	313.634	14.74	-	2	-	Glycol-rich phase
40.484	313.634	14.74	77.61	2	0.7844	Nitromethane-rich phase
40.570	313.720	15.03	-	2	-	Glycol-rich phase
40.570	313.720	15.03	69.31	2	0.7041	Nitromethane-rich phase
40.160	313.310	20.01	48.60	2	0.4981	Glycol-rich phase
40.160	313.310	20.01	-	2	-	Nitromethane-rich phase
40.680	313.830	20.01	50.60	2	0.5181	Glycol-rich phase
40.680	313.830	20.01	-	2	-	Nitromethane-rich phase
41.580	314.730	20.03	58.75	2	0.5992	Glycol-rich phase
41.580	314.730	20.03	-	2	-	Nitromethane-rich phase
41.736	314.886	20.02	-	2	-	Glycol-rich phase
41.736	314.886	20.02	69.31	2	0.7041	Nitromethane-rich phase
40.284	313.434	29.98	48.60	2	0.4981	Glycol-rich phase
40.284	313.434	29.98	-	2	-	Nitromethane-rich phase
40.717	313.867	30.31	-	2	-	Glycol-rich phase
40.717	313.867	30.31	77.61	2	0.7844	Nitromethane-rich phase
40.838	313.988	31.32	50.60	2	0.5181	Glycol-rich phase
40.838	313.988	31.32	-	2	-	Nitromethane-rich phase
41.744	314.894	30.04	58.75	2	0.5992	Glycol-rich phase
41.744	314.894	30.04	-	2	-	Nitromethane-rich phase
41.866	315.016	30.05	-	2	-	Glycol-rich phase
41.866	315.016	30.05	69.31	2	0.7041	Nitromethane-rich phase
40.795	313.945	35.06	-	2	-	Glycol-rich phase
40.795	313.945	35.06	77.61	2	0.7844	Nitromethane-rich phase
40.289	313.539	40.05	48.60	2	0.4981	Glycol-rich phase
40.289	313.539	40.05	-	2	-	Nitromethane-rich phase
40.924	314.074	40.93	50.60	2	0.5181	Glycol-rich phase
40.924	314.074	40.93	-	2	-	Nitromethane-rich phase
41.993	315.143	40.00	-	2	-	Glycol-rich phase
41.993	315.143	40.00	69.31	2	0.7041	Nitromethane-rich phase
42.053	315.203	40.13	58.75	2	0.5992	Glycol-rich phase
42.053	315.203	40.13	-	2	-	Nitromethane-rich phase
42.184	315.334	40.11	-	2	-	Glycol-rich phase
42.184	315.334	40.11	64.28	2	0.6539	Nitromethane-rich phase
40.433	313.583	44.86	48.60	2	0.4981	Glycol-rich phase
40.433	313.583	44.86	-	2	-	Nitromethane-rich phase
40.957	314.107	45.03	-	2	-	Glycol-rich phase
40.957	314.107	45.03	77.61	2	0.7844	Nitromethane-rich phase
40.510	313.660	50.08	48.60	2	0.4981	Glycol-rich phase
40.510	313.660	50.08	-	2	-	Nitromethane-rich phase
41.074	314.224	50.05	50.60	2	0.5189	Glycol-rich phase
41.074	314.224	50.05	-	2	-	Nitromethane-rich phase
42.133	315.283	50.01	-	2	-	Glycol-rich phase
42.133	315.283	50.01	69.31	2	0.7041	Nitromethane-rich phase
42.185	315.335	50.16	58.75	2	0.5992	Glycol-rich phase
42.185	315.335	50.16	-	2	-	Nitromethane-rich phase
42.335	315.505	50.03	-	2	-	Glycol-rich phase
42.335	315.505	50.03	64.28	2	0.6539	Nitromethane-rich phase

Method/Apparatus/Procedure:
   The synthetic method was used. Measurements were made using techniques and apparatus described in Ref. 1 with minor modification. Mixtures of (1) and (2) were prepared gravimetrically. The solutions were degassed with a series of freeze-pump (≤0.1 Pa) - thaw cycles. After transfer to the apparatus (previously warmed above the CST) the demixing was determined by allowing the mixture to cool to the transition temperature at a rate of (3 to 5) mK/min while stirring. Temperature was measured by platinum resistance thermometry.

Source and Purity of Materials:
   (1) Mallinkrodt; analytical grade; dried over anhydrous CaCl₂ and twice distilled in a spinning band column below 343 K.
   (2) Prepared by refluxing reagent grade 99.8 % D₂O/ethanediol = 2.5/1 and removing the water by fractional distillation at reduced pressure; the deuterated glycol fraction was collected, dried again over molecular sieve and redistilled.

Estimated Errors:

   Temperature: ± 0.3 mK.
   Pressure: ±0.01MPa.

References:
   ¹ R. R. Singh and W. A. Van Hook, J. Chem. Phys. 87, 6097 (1987).

---

Distributed by the Office of Data and Informatics of the National Institute of Standards and Technology (NIST) Material Measurement Laboratory (MML).
Website is owned by NIST (an agency of the U.S. Department of Commerce)

---

Last updated: February 18, 2015 (Created: August 17, 2007)