Acetic acid (data page)

This page provides supplementary chemical data on acetic acid.

== Material Safety Data Sheet ==

The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet (MSDS) for this chemical from a reliable source and follow its directions.

[https://web.archive.org/web/20071026012612/http://ptcl.chem.ox.ac.uk/MSDS/AC/acetic_acid.html PTCL Safety web site]
[https://web.archive.org/web/20081013024238/http://www.sciencestuff.com/msds/C1120.html Science Stuff]

== Structure and properties ==

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! {{chembox header}} | Structure and properties

Index of refraction, n_D

| 1.3716

Dielectric constant, ε_r

| 6.15 ε₀ at 20 °C

Bond strength

| ?

Bond length

| ?

Bond angle

| ?

Magnetic susceptibility

| ?

Surface tension

| 26.6 dyn/cm at 30 °C

ViscosityLange's Handbook of Chemistry, 10th ed. pp 1669-1674

| 1.222 mPa·s

at 20 °C

1.0396 mPa·s

at 30 °C

0.7956 mPa·s

at 50 °C

0.4244 mPa·s

at 110 °C

== Thermodynamic properties ==

border="1" cellspacing="0" cellpadding="6" style="margin: 0 0 0 0.5em; background: #FFFFFF; border-collapse: collapse; border-color: #C0C090;" ! {{chembox header}} \| Phase behavior
Triple point \| 289.8 K (16.7 °C), ? Pa
Critical point \| 593 K (320 °C), 57.8 bar
Eutectic point with water \| –26.7 °C
Std enthalpy change of fusionΔ_fusH^o \| +11.7 kJ/mol
Std entropy change of fusionΔ_fusS^o \| 40.5 J/(mol·K)
Std enthalpy change of vaporizationΔ_vapH^o \| +23.7 kJ/mol
Std entropy change of vaporizationΔ_vapS^o \| ? J/(mol·K)
{{chembox header}} \| Solid properties
Std enthalpy change of formation Δ_fH^o_solid \| ? kJ/mol
Standard molar entropy S^o_solid \| ? J/(mol K)
Heat capacity c_p \| ? J/(mol K)
{{chembox header}} \| Liquid properties
Std enthalpy change of formation Δ_fH^o_liquid \| −483.5 kJ/mol
Standard molar entropy S^o_liquid \| 158.0 J/(mol K)
Enthalpy of combustion, Δ_cH^o \| –876.1 kJ/mol
Heat capacity c_p \| 123.1 J/(mol K)
{{chembox header}} \| Gas properties
Std enthalpy change of formation Δ_fH^o_gas \| –438.1 kJ/mol
Standard molar entropy S^o_gas \| 282.84 J/(mol K)
Heat capacity c_p \| 63.4 J/(mol K)
van der Waals' constantsLange's Handbook of Chemistry 10th ed, pp 1522-1524 \| a = 1782.3 L² kPa/mol² b = 0.1068 liter per mole

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! {{chembox header}} | Phase behavior

Triple point

| 289.8 K (16.7 °C), ? Pa

Critical point

| 593 K (320 °C), 57.8 bar

Eutectic point with water

| –26.7 °C

Std enthalpy change
of fusionΔ_fusH^o

| +11.7 kJ/mol

Std entropy change
of fusionΔ_fusS^o

| 40.5 J/(mol·K)

Std enthalpy change
of vaporizationΔ_vapH^o

| +23.7 kJ/mol

Std entropy change
of vaporizationΔ_vapS^o

| ? J/(mol·K)

{{chembox header}} | Solid properties

Std enthalpy change
of formation Δ_fH^o_solid

| ? kJ/mol

Standard molar entropy
S^o_solid

| ? J/(mol K)

Heat capacity c_p

| ? J/(mol K)

{{chembox header}} | Liquid properties

Std enthalpy change
of formation Δ_fH^o_liquid

| −483.5 kJ/mol

Standard molar entropy
S^o_liquid

| 158.0 J/(mol K)

Enthalpy of combustion, Δ_cH^o

| –876.1 kJ/mol

Heat capacity c_p

| 123.1 J/(mol K)

{{chembox header}} | Gas properties

Std enthalpy change
of formation Δ_fH^o_gas

| –438.1 kJ/mol

Standard molar entropy
S^o_gas

| 282.84 J/(mol K)

Heat capacity c_p

| 63.4 J/(mol K)

van der Waals' constantsLange's Handbook of Chemistry 10th ed, pp 1522-1524

| a = 1782.3 L² kPa/mol²
b = 0.1068 liter per mole

Vapor pressure of liquid

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{{chembox header}} \| P in mm Hg	1	10	40	100	400	760	1520	3800	7600	15200	30400	45600
{{chembox header}} \| T in °C	–17.2	17.5	43.0	63.0	99.0	118.1	143.5	180.3	214.0	252.0	297.0	—

Table data obtained from CRC Handbook of Chemistry and Physics 44th ed.

[[Image:aceticAcidVaporPressure.png|thumb|192px|left|Acetic acid vapor pressure vs. temperature. Uses formula:

\scriptstyle P_{mmHg}=10^{7.80307 - \frac {1651.2} {225+T}}

for T = 0 to 36 °C

$\scriptstyle P_{mmHg}=10^{7.18807 - \frac {1416.7} {211+T}}$ for T = 36 to 170 °C

Formula from Lange's Handbook of Chemistry, 10th ed.]]

[[Image:logAceticAcidVaporPressure.png|thumb|358px|left|log₁₀ of acetic acid vapor pressure vs. temperature. Uses formula: $\scriptstyle \log_{10}P_{mmHg}=7.80307 - \frac {1651.2} {225+T}$ for T = 0 to 36 °C

$\scriptstyle \log_{10}P_{mmHg}=7.18807 - \frac {1416.7} {211+T}$ for T = 36 to 170 °C

Formula from Lange's Handbook of Chemistry, 10th ed.

]]

Distillation data

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bgcolor="#D0D0D0" align="center" colspan="3"\| Vapor-liquid Equilibrium for Acetic acid/Water{{cite web\|url=http://www.cheric.org/research/kdb/hcvle/hcvle.php\|title=Binary Vapor-Liquid Equilibrium Data\|publisher=Chemical Engineering Research Information Center\|format=Queriable database\|accessdate=5 May 2007}} P = 760 mm Hg
{{chembox header}} ! rowspan="2" \| BP Temp. °C ! colspan="2" \| mole % water
{{chembox header}} ! liquid !! vapor
116.5	2.2	5.8
114.6	5.4	12.3
113.4	8.6	16.8
113.5	9.9	18.3
113.1	10.1	18.8
110.6	18.9	29.8
107.8	30.3	43.3
106.1	41.3	54.5
104.4	52.2	64.9
103.1	62.4	73.5
102.3	69.6	79.2
101.6	77.8	85.1
100.8	87.6	91.4
100.5	92.3	94.4
100.4	94.5	96.0
100.1	98.5	98.9

== Spectral data ==

{{chembox header}} \| IR
border="1" cellspacing="0" cellpadding="3" style="margin: 0 0 0 0.5em; background: #FFFFFF; border-collapse: collapse; border-color: #C0C090;" ! {{chembox header}} \| UV-Vis
λ_max \| 207 nm (gas phase)
Extinction coefficient, ε \| ?
Major absorption bands{{cite web\|url=http://riodb01.ibase.aist.go.jp/sdbs/cgi-bin/cre_index.cgi?lang=eng\|title=Spectral Database for Organic Compounds\|publisher=Advanced Industrial Science and Technology\|format=Queriable database\|accessdate=9 June 2007\|archive-date=14 January 2013\|archive-url=https://web.archive.org/web/20130114222220/http://riodb01.ibase.aist.go.jp/sdbs/cgi-bin/cre_index.cgi?lang=eng\|url-status=dead}} \| {\|
colspan="2" align="center" \| (liquid film)
Wave number	transmittance
2937 cm⁻¹	26%
2684 cm⁻¹	41%
2631 cm⁻¹	39%
2569 cm⁻¹	49%
1758 cm⁻¹	19%
1714 cm⁻¹	4%
1617 cm⁻¹	66%
1414 cm⁻¹	20%
1360 cm⁻¹	39%
1294 cm⁻¹	12%
1053 cm⁻¹	67%
1016 cm⁻¹	41%
937 cm⁻¹	35%
892 cm⁻¹	41%
629 cm⁻¹	31%
607 cm⁻¹	49%
481 cm⁻¹	36%
473 cm⁻¹	52%

! {{chembox header}} | NMR

| Proton NMR

| δ CDCl₃ 2.10 (3H), 11.42 (1H)

| Carbon-13 NMR

| δ CDCl₃ 20.8, 178.1

| Other NMR data

! {{chembox header}} | MS

| Masses of
main fragments

| 60 (75%), 45 (90%),
43 (100%), 42 (13%), 15 (17%)

References

{{nist}}
{{Cite journal | doi = 10.1016/S1010-6030(03)00067-4 | last1 = Orlando | first1 = John J. | last2 = Tyndall | first2 = Geoffrey S. | year = 2003 | title = Gas phase UV absorption spectra for peracetic acid, and for acetic acid monomers and dimers | journal = J. Photochem. Photobiol. A | volume = 157 | issue = 2–3| pages = 161–66 | bibcode = 2003JPPA..157..161O | url = https://zenodo.org/record/1260186 | archive-url = https://web.archive.org/web/20230411150204/https://zenodo.org/record/1260186 | url-status = dead | archive-date = April 11, 2023 }}

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