Benzene, 1,4-dimethoxy-
- Formula: C8H10O2
- Molecular weight: 138.1638
- IUPAC Standard InChIKey: OHBQPCCCRFSCAX-UHFFFAOYSA-N
- CAS Registry Number: 150-78-7
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Benzene, p-dimethoxy-; p-Dimethoxybenzene; Dimethylhydroquinone ether; DMB; Hydroquinone dimethyl ether; Quinol dimethyl ether; 1,4-Dimethoxybenzene; p-Methoxyanisole; Dimethyl ether hydroquinone; USAF AN-9; Anisole, p-methoxy-; Dimethylether hydrochinonu; Usaf uctl-1791; 4-Methoxyanisole; Methyl p-methoxyphenyl ether; 4-Methoxyphenol, methyl ether; 1,4-Dimethoxybenzol; Methyl 4-methoxyphenyl ether; NSC 7483; Dimethylhydroquinone; Dimethylolbenzimidazolon; 1,3-Bis(hydroxymethyl)-2-benzimidazolinone; 2-Benzimidazolinone, 1,3-bis(hydroxymethyl)-
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Data at other public NIST sites:
- Options:
Data at NIST subscription sites:
NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.
Phase change data
Go To: Top, IR Spectrum, Mass spectrum (electron ionization), Gas Chromatography, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 485.8 | K | N/A | Weast and Grasselli, 1989 | BS |
Tboil | 485.8 | K | N/A | Perkin, 1896 | Uncertainty assigned by TRC = 1.5 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 329. | K | N/A | Vowinkel, 1966 | Uncertainty assigned by TRC = 3. K; TRC |
Tfus | 329.45 | K | N/A | Nagakura and Baba, 1952 | Uncertainty assigned by TRC = 0.6 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔsubH° | 84.1 ± 2.3 | kJ/mol | C | Matos, Miranda, et al., 2000 | AC |
Reduced pressure boiling point
Tboil (K) | Pressure (bar) | Reference | Comment |
---|---|---|---|
382.2 | 0.027 | Weast and Grasselli, 1989 | BS |
Enthalpy of vaporization
ΔvapH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
62.1 | 313. | A | Stephenson and Malanowski, 1987 | Based on data from 298. to 357. K.; AC |
IR Spectrum
Go To: Top, Phase change data, Mass spectrum (electron ionization), Gas Chromatography, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Gas Phase Spectrum
Notice: This spectrum may be better viewed with a Javascript and HTML 5 enabled browser.
Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.
Additional Data
View image of digitized spectrum (can be printed in landscape orientation).
View spectrum image in SVG format.
Download spectrum in JCAMP-DX format.
Owner | NIST Standard Reference Data Program Collection (C) 2018 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
---|---|
Origin | Sadtler Research Labs Under US-EPA Contract |
State | gas |
Mass spectrum (electron ionization)
Go To: Top, Phase change data, IR Spectrum, Gas Chromatography, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Spectrum
Notice: This spectrum may be better viewed with a Javascript and HTML 5 enabled browser.
Additional Data
View image of digitized spectrum (can be printed in landscape orientation).
Due to licensing restrictions, this spectrum cannot be downloaded.
Owner | NIST Mass Spectrometry Data Center Collection (C) 2014 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
---|---|
Origin | NIST Mass Spectrometry Data Center, 1990. |
NIST MS number | 113405 |
Gas Chromatography
Go To: Top, Phase change data, IR Spectrum, Mass spectrum (electron ionization), References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Kovats' RI, non-polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Capillary | SE-30 | 100. | 1143.4 | Tudor, 1997 | 40. m/0.35 mm/0.35 μm |
Packed | Apiezon L | 100. | 1143. | Bogoslovsky, Anvaer, et al., 1978 | Chromatone N AW DNCS |
Packed | Apiezon L | 150. | 1159. | Bogoslovsky, Anvaer, et al., 1978 | Chromatone N AW DNCS |
Van Den Dool and Kratz RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | HP-5 | 1170. | Zhao J.Y., Liu J.M., et al., 2006 | 30. m/0.25 mm/0.25 μm, He, 60. C @ 2. min, 10. K/min, 250. C @ 10. min |
Capillary | HP-5 | 1163. | Fokialakis, Magiatis, et al., 2002 | 30. m/0.25 mm/0.25 μm, 60. C @ 5. min, 3. K/min; Tend: 280. C |
Capillary | SE-54 | 1165.21 | Yin, Xiu, et al., 2001 | 35. C @ 3. min, 4. K/min, 230. C @ 10. min; Column length: 25. m; Column diameter: 0.31 mm |
Capillary | SE-54 | 1167.74 | Yin, Xiu, et al., 2001 | 35. C @ 3. min, 4. K/min, 230. C @ 10. min; Column length: 25. m; Column diameter: 0.31 mm |
Van Den Dool and Kratz RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | VF-5MS | 1180.1 | Tret'yakov, 2008 | 30. m/0.25 mm/0.25 μm, He; Program: Multi-step temperature program; T(initial)=60C; T(final)=270C |
Capillary | VF-5MS | 1177. | Tret'yakov, 2008 | 30. m/0.25 mm/0.25 μm, He; Program: Multi-step temperature program; T(initial)=60C; T(final)=270C |
Van Den Dool and Kratz RI, polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-Wax | 1727. | Cantergiani, Brevard, et al., 2001 | 30. m/0.25 mm/0.25 μm; Program: 20C(30s) => fast => 60C => 4C/min => 220C (20min) |
Normal alkane RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | VF-5 MS | 1185. | Souza, Re-Poppi, et al., 2012 | 30. m/0.25 mm/0.25 μm, Helium, 60. C @ 1. min, 6. K/min, 280. C @ 3. min |
Capillary | ZP-5 | 1175. | Füssel, Dötterl, et al., 2007 | 60. m/0.25 mm/0.25 μm, He, 40. C @ 7. min, 6. K/min, 260. C @ 1. min |
Capillary | HP-5MS | 1165. | Bozin, Mimicá-Dukic, et al., 2006 | 30. m/0.25 mm/0.25 μm, He, 3. K/min; Tstart: 60. C; Tend: 280. C |
Capillary | CP Sil 8 CB | 1168. | Li, Lee, et al., 2006 | 30. m/0.25 mm/0.25 μm, 40. C @ 5. min, 3. K/min, 250. C @ 20. min |
Capillary | HP-101 | 1158. | Mastelic, Jerkovic, et al., 2006 | 25. m/0.2 mm/0.2 μm, He, 70. C @ 2. min, 3. K/min, 200. C @ 15. min |
Capillary | DB-1 | 1128. | Park, Lee, et al., 2004 | 60. m/0.32 mm/0.25 μm, He, 35. C @ 4. min, 2. K/min, 230. C @ 25. min |
Capillary | DB-1 | 1130. | Park, Lee, et al., 2004 | 60. m/0.32 mm/0.25 μm, He, 35. C @ 4. min, 2. K/min, 230. C @ 25. min |
Capillary | DB-1 | 1130. | Park, Lee, et al., 2004 | 60. m/0.32 mm/0.25 μm, He, 35. C @ 4. min, 2. K/min, 230. C @ 25. min |
Capillary | DB-1 | 1132. | Park, Lee, et al., 2004 | 60. m/0.32 mm/0.25 μm, He, 35. C @ 4. min, 2. K/min, 230. C @ 25. min |
Capillary | CBP-1 | 1122. | Lamarque, Maestri, et al., 1998 | He, 4. K/min; Column length: 30. m; Column diameter: 0.25 mm; Tstart: 60. C; Tend: 240. C |
Capillary | CP Sil 5 CB | 1171. | Bos, Woerdenbag, et al., 1997 | 25. m/0.32 mm/0.25 μm, N2, 4. K/min; Tstart: 50. C; Tend: 290. C |
Capillary | DB-1 | 1122. | Guy and Vernin, 1996 | He, 70. C @ 5. min, 3. K/min; Column length: 30. m; Column diameter: 0.25 mm; Tend: 300. C |
Capillary | Ultra-1 | 1131. | Okumura, 1991 | 25. m/0.32 mm/0.25 μm, He, 3. K/min; Tstart: 80. C; Tend: 260. C |
Normal alkane RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | VF-5 | 1172. | Shivashankar, Roy, et al., 2012 | 30. m/0.25 mm/0.25 μm, Helium; Program: 50 0C (2 min) 3 0C/min -> 200 0C (3 min) 10 0C/min -> 220 0C (8 min) |
Capillary | VF-5 | 1186. | Shivashankar, Roy, et al., 2012 | 30. m/0.25 mm/0.25 μm, Helium; Program: not specified |
Capillary | SE-30 | 1145. | Vinogradov, 2004 | Program: not specified |
Capillary | HP-5MS | 1192. | Ansorena, Gimeno, et al., 2001 | 30. m/0.25 mm/0.25 μm, He; Program: 40C (10min) => 3C/min => 120C => 10C/min => 250C (5min) |
Capillary | Polydimethyl siloxane | 1145. | Spanier, Shahidi, et al., 2001 | Program: not specified |
Normal alkane RI, polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | AT-Wax | 1752. | Kiss, Csoka, et al., 2011 | 60. m/0.25 mm/0.25 μm, Helium, 4. K/min; Tstart: 60. C; Tend: 280. C |
Capillary | DB-Wax | 1728. | Dregus and Engel, 2003 | 60. m/0.32 mm/0.25 μm, H2, 40. C @ 5. min, 4. K/min, 230. C @ 25. min |
Capillary | Supelcowax-10 | 1747. | Lamarque, Maestri, et al., 1998 | He, 4. K/min; Column length: 30. m; Column diameter: 0.25 mm; Tstart: 60. C; Tend: 240. C |
Capillary | PEG-20M | 1759. | Awano, Honda, et al., 1997 | He, 3. K/min; Column length: 60. m; Column diameter: 0.25 mm; Tstart: 70. C; Tend: 210. C |
Capillary | TC-Wax | 1747. | Shuichi, Masazumi, et al., 1996 | 80. C @ 5. min, 3. K/min; Column length: 60. m; Column diameter: 0.25 mm; Tend: 240. C |
Capillary | DB-Wax | 1750. | Andersen J.F., Mikolajczak K.L., et al., 1987 | Helium, 40. C @ 1. min, 6. K/min; Column length: 30. m; Column diameter: 0.32 mm; Tend: 200. C |
Normal alkane RI, polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-Wax | 1757. | Caldentey, Daria Fumi, et al., 1998 | 30. m/0.25 mm/0.25 μm, He; Program: 25C(8min) => 4C/min => 60C => 6C/min => 160C => 20C/min => 200C |
References
Go To: Top, Phase change data, IR Spectrum, Mass spectrum (electron ionization), Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [all data]
Perkin, 1896
Perkin, W.H.,
LXIX. On Magnetic Rotatory Power, especially of Aromatic Compounds,
J. Chem. Soc., 1896, 69, 1025-1257. [all data]
Vowinkel, 1966
Vowinkel, E.,
Preparation of Aryl Alky8 Ethers by Means of O-Alkyl-N,N'-dicyclohexyl- isoureas,
Chem. Ber., 1966, 99, 1479-84. [all data]
Nagakura and Baba, 1952
Nagakura, S.; Baba, H.,
Dipole moments and near-ultraviolet absorption of some monosubsti- tuted benzenes--the effect of solvents and hydrogen bonding.,
J. Am. Chem. Soc., 1952, 74, 5693. [all data]
Matos, Miranda, et al., 2000
Matos, M.A.R.; Miranda, M.S.; Morais, V.M.F.,
Calorimetric and Theoretical Determination of Standard Enthalpies of Formation of Dimethoxy- and Trimethoxybenzene Isomers,
J. Phys. Chem. A, 2000, 104, 40, 9260-9265, https://doi.org/10.1021/jp001928g
. [all data]
Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw,
Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2
. [all data]
Tudor, 1997
Tudor, E.,
Temperature dependence of the retention index for perfumery compounds on a SE-30 glass capillary column. I. Linear equations,
J. Chromatogr. A, 1997, 779, 1-2, 287-297, https://doi.org/10.1016/S0021-9673(97)00453-6
. [all data]
Bogoslovsky, Anvaer, et al., 1978
Bogoslovsky, Yu.N.; Anvaer, B.I.; Vigdergauz, M.S.,
Chromatographic constants in gas chromatography (in Russian), Standards Publ. House, Moscow, 1978, 192. [all data]
Zhao J.Y., Liu J.M., et al., 2006
Zhao J.Y.; Liu J.M.; Zhang X.Y.; Liu Z.J.; Tsering T.; Zhong Y.; Nan P.,
Chemical composition of the volatiles of three wild Bergenia species from western China,
Flavour Fragr. J., 2006, 21, 3, 431-434, https://doi.org/10.1002/ffj.1689
. [all data]
Fokialakis, Magiatis, et al., 2002
Fokialakis, N.; Magiatis, P.; Mitaku, S.,
Essential oil constituents of Valeriana italica and Valeriana tuberosa. Stereochemical and conformational study of 15-acetoxyvaleranone,
Z. Naturforsch., 2002, 57c, 791-796. [all data]
Yin, Xiu, et al., 2001
Yin, W.; Xiu, Z.; Aijin, H.,
Analysis of the volatile components in trogopterorum feces by capillary gas chromatography and gas chromatography/mass spectrometry,
Fenxi Huaxue, 2001, 29, 2, 195-198. [all data]
Tret'yakov, 2008
Tret'yakov, K.V.,
Retention Data. NIST Mass Spectrometry Data Center., NIST Mass Spectrometry Data Center, 2008. [all data]
Cantergiani, Brevard, et al., 2001
Cantergiani, E.; Brevard, H.; Krebs, Y.; Feria-Morales, A.; Amadò, R.; Yeretzian, C.,
Characterisation of the aroma of green Mexican coffee and identification of mouldy/earthy defect,
Eur. Food Res. Technol., 2001, 212, 6, 648-657, https://doi.org/10.1007/s002170100305
. [all data]
Souza, Re-Poppi, et al., 2012
Souza, J.B.G.; Re-Poppi, N.; Raposo, J.L.(Jr).,
Characterization of pyroligneous acid used in agriculture by gas chromatography - mass spectrometry (in press),
J. Braz. Chem. Soc., 2012, 00, 00, 1-8. [all data]
Füssel, Dötterl, et al., 2007
Füssel, U.; Dötterl, S.; Jürgens, A.; Aas, G.,
Inter- and intraspecific variation in floral scent in the genus Salix and its implication for pollination,
J. Chem. Ecol., 2007, 33, 4, 749-765, https://doi.org/10.1007/s10886-007-9257-6
. [all data]
Bozin, Mimicá-Dukic, et al., 2006
Bozin, B.; Mimicá-Dukic, N.; Simin, N.; Anackov, G.,
Characterization of the volatile composition of essential oils of some lamiaceae spices and the antimicrobial and antioxidant activities of the entire oils,
J. Agric. Food Chem., 2006, 54, 5, 1822-1828, https://doi.org/10.1021/jf051922u
. [all data]
Li, Lee, et al., 2006
Li, Z.-G.; Lee, M.-R.; Shen, D.-L.,
Analysis of volatile compounds emitted from fresh Syringa oblata flowers in different florescence by headspace solid-phase microextraction-gas chromatography-mass spectrometry,
Anal. Chim. Acta., 2006, 576, 1, 43-49, https://doi.org/10.1016/j.aca.2006.01.074
. [all data]
Mastelic, Jerkovic, et al., 2006
Mastelic, J.; Jerkovic, I.; Mesic, M.,
Volatile constituents from flowers, leaves, bark and wood of Prunus mahaleb L.,
Flavour Fragr. J., 2006, 21, 2, 306-313, https://doi.org/10.1002/ffj.1596
. [all data]
Park, Lee, et al., 2004
Park, B.-S.; Lee, K.-G.; Takeoka, G.R.,
Comparison of three sample preparation methods on the recovery of volatiles from taheebo (Tabebuia impetiginosa Martius ex DC),
Flavour Fragr. J., 2004, 19, 4, 287-292, https://doi.org/10.1002/ffj.1345
. [all data]
Lamarque, Maestri, et al., 1998
Lamarque, A.L.; Maestri, D.M.; Zygadlo, J.A.; Grosso, N.R.,
Volatile constituents from flowers of Acacia caven (Mol.) Mol. var. caven, Acacia aroma Gill. ex Hook., Erythrina crista-galli L. and Calliandra tweedii Benth.,
Flavour Fragr. J., 1998, 13, 4, 266-268, https://doi.org/10.1002/(SICI)1099-1026(1998070)13:4<266::AID-FFJ739>3.0.CO;2-5
. [all data]
Bos, Woerdenbag, et al., 1997
Bos, R.; Woerdenbag, H.J.; Hendriks, H.; Smit, H.F.; Wikström, H.V.; Scheffer, J.J.C.,
Composition of the essential oil from roots and rhizomes of Valeriana wallichii DC,
Flavour Fragr. J., 1997, 12, 2, 123-131, https://doi.org/10.1002/(SICI)1099-1026(199703)12:2<123::AID-FFJ613>3.0.CO;2-4
. [all data]
Guy and Vernin, 1996
Guy, I.; Vernin, G.,
Minor compounds from Cistus ladaniferus L. essential oil from esterel. 2. Acids and phenols,
J. Essent. Oil Res., 1996, 8, 4, 455-462, https://doi.org/10.1080/10412905.1996.9700666
. [all data]
Okumura, 1991
Okumura, T.,
retention indices of environmental chemicals on methyl silicone capillary column,
Journal of Environmental Chemistry (Japan), 1991, 1, 2, 333-358, https://doi.org/10.5985/jec.1.333
. [all data]
Shivashankar, Roy, et al., 2012
Shivashankar, S.; Roy, T.K.; Moorthy, P.N.R.,
Headspace solid phase micro extraction and GC/MS analysis of the volatile components in seed and cake of Azadirachta indica A. juss,
Chem. Bull. of Politechnika Univ. Timisoara, Romania, 2012, 57(71), 1, 1-6. [all data]
Vinogradov, 2004
Vinogradov, B.A.,
Production, composition, properties and application of essential oils, 2004, retrieved from http://viness.narod.ru. [all data]
Ansorena, Gimeno, et al., 2001
Ansorena, D.; Gimeno, O.; Astiasarán, I.; Bello, J.,
Analysis of volatile compounds by GC-MS of a dry fermented sausage: chorizo de Pamplona,
Food Res. Int., 2001, 34, 1, 67-75, https://doi.org/10.1016/S0963-9969(00)00133-2
. [all data]
Spanier, Shahidi, et al., 2001
Spanier, A.M.; Shahidi, F.; Par; iment, T.H.; Mussinan, C.,
Food Flavors and Chemistry. Advances of the New Millenium, Royal Soc. Chem., 2001, 666. [all data]
Kiss, Csoka, et al., 2011
Kiss, M.; Csoka, M.; Gyorfi, J.; Korany, K.,
Comparison of the fragrance constituents of Tuber aestivium and Tuber Brumale gathered in Hungary,
J. Appl. Botany Food Quality, 2011, 84, 102-110. [all data]
Dregus and Engel, 2003
Dregus, M.; Engel, K.-H.,
Volatile constituents of uncooked Rhubarb (Rheum rhabarbarum L.) stalks,
J. Agric. Food Chem., 2003, 51, 22, 6530-6536, https://doi.org/10.1021/jf030399l
. [all data]
Awano, Honda, et al., 1997
Awano, K.; Honda, T.; Ogawa, T.; Suzuki, S.; Matsunaga, Y.,
Volatile components of Phalaenopsis schilleriana Rehb. f.,
Flavour Fragr. J., 1997, 12, 5, 341-344, https://doi.org/10.1002/(SICI)1099-1026(199709/10)12:5<341::AID-FFJ657>3.0.CO;2-L
. [all data]
Shuichi, Masazumi, et al., 1996
Shuichi, H.; Masazumi, N.; Hiromu, K.; Kiyoshi, F.,
Comparison of volatile compounds berween the crude drugs, Onji-tsutsu and Onji-niki,
Nippon nogei kagaku kaishi, 1996, 70, 2, 151-160. [all data]
Andersen J.F., Mikolajczak K.L., et al., 1987
Andersen J.F.; Mikolajczak K.L.; Reed D.K.,
Analysis of peach bark volatiles and their electroantennogram activity with lesser pechtree borer, Synanthedon pictipes (Grote and Robinson),
J. Chem. Ecol., 1987, 13, 11, 2103-2114, https://doi.org/10.1007/BF01012874
. [all data]
Caldentey, Daria Fumi, et al., 1998
Caldentey, P.; Daria Fumi, M.; Mazzoleni, V.; Careri, M.,
Volatile compounds produced by microorganisms isolated from cork,
Flavour Fragr. J., 1998, 13, 3, 185-188, https://doi.org/10.1002/(SICI)1099-1026(199805/06)13:3<185::AID-FFJ723>3.0.CO;2-W
. [all data]
Notes
Go To: Top, Phase change data, IR Spectrum, Mass spectrum (electron ionization), Gas Chromatography, References
- Symbols used in this document:
Tboil Boiling point Tfus Fusion (melting) point ΔsubH° Enthalpy of sublimation at standard conditions ΔvapH Enthalpy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.