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Wm. Craig Byrdwell, phd |
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Taking Lipid Analysis into the 21st Century |
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For a conveniently printable .pdf version of this mass list, click HERE |
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c = cis double bond, t = trans d.b., n– refers to the first double bond position, from the end of the fatty acid chain. The above list includes only the most common fatty acids. A more complete list of fatty acids, according to their trivial names, may be found at : |
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Calculated monoisotopic masses of Fatty Acids and Triacylglycerols and their adducts and fragments are based on the following atomic isotope masses:
1H = 1.0078250321 12C = 12.000000 14N = 14.0030740052 16O = 15.9949146221 23Na = 22.98976967 31P = 30.97376151
These masses are the most recent suggested isotopic masses from the National Institute of Standards and Technology (NIST) at:
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© 2005-2009 The figures and tables on this website are copyrighted in 2005-2009 by William Craig Byrdwell and Byrdwell.com. Please reference
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Fatty Acids and Related Masses |
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Systematic Fatty Acid Name |
Common Fatty Acid Name |
Abbrev. |
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Fatty Acid Mass |
[RCOO+58]+ |
[RCO]+ |
[RCOO]– |
Pure Triacylglycerol |
Intact Diacylglycerol |
[DAG]+ Fragment |
Intact Monoacylglycerol |
Fatty Acid Methyl Ester |
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C |
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U |
ECN |
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(– mode) |
(TAG) |
(DAG) |
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(MAG) |
(FAME) |
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Butanoic |
Butyric |
Bu |
4 |
: |
0 |
4 |
88.05 |
145.09 |
71.05 |
87.04 |
302.17 |
232.13 |
215.13 |
162.09 |
102.07 |
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Pentanoic |
Valeric |
V |
5 |
: |
0 |
5 |
102.07 |
159.10 |
85.07 |
101.06 |
344.22 |
260.16 |
243.16 |
176.10 |
116.08 |
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Hexanoic |
Caproic |
Co |
6 |
: |
0 |
6 |
116.08 |
173.12 |
99.08 |
115.08 |
386.27 |
288.19 |
271.19 |
190.12 |
130.10 |
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Heptanoic |
Enanthic |
En |
7 |
: |
0 |
7 |
130.10 |
187.13 |
113.10 |
129.09 |
428.31 |
316.22 |
299.22 |
204.14 |
144.12 |
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Octanoic |
Caprylic |
Cy |
8 |
: |
0 |
8 |
144.12 |
201.15 |
127.11 |
143.11 |
470.36 |
344.26 |
327.25 |
218.15 |
158.13 |
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Nonanoic |
Pelargonic |
Pg |
9 |
: |
0 |
9 |
158.13 |
215.16 |
141.13 |
157.12 |
512.41 |
372.29 |
355.28 |
232.17 |
172.15 |
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Decanoic |
Capric |
Ca |
10 |
: |
0 |
10 |
172.15 |
229.18 |
155.14 |
171.14 |
554.45 |
400.32 |
383.32 |
246.18 |
186.16 |
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Hendecanoic |
----- |
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11 |
: |
0 |
11 |
186.16 |
243.20 |
169.16 |
185.15 |
596.50 |
428.35 |
411.35 |
260.20 |
200.18 |
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Dodecanoic |
Lauric |
La |
12 |
: |
0 |
12 |
200.18 |
257.21 |
183.17 |
199.17 |
638.55 |
456.38 |
439.38 |
274.21 |
214.19 |
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Tridecanoic |
----- |
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13 |
: |
0 |
13 |
214.19 |
271.23 |
197.19 |
213.19 |
680.60 |
484.41 |
467.41 |
288.23 |
228.21 |
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Tetradecanoic |
Myristic |
M |
14 |
: |
0 |
14 |
228.21 |
285.24 |
211.21 |
227.20 |
722.64 |
512.44 |
495.44 |
302.25 |
242.22 |
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Pentadecanoic |
----- |
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15 |
: |
0 |
15 |
242.22 |
299.26 |
225.22 |
241.22 |
764.69 |
540.48 |
523.47 |
316.26 |
256.24 |
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Hexadecanoic |
Palmitic |
P |
16 |
: |
0 |
16 |
256.24 |
313.27 |
239.24 |
255.23 |
806.74 |
568.51 |
551.50 |
330.28 |
270.26 |
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c-9-Hexadecenoic |
Palmitoleic (n-7) |
Po |
16 |
: |
1 |
14 |
254.22 |
311.26 |
237.22 |
253.22 |
800.69 |
564.48 |
547.47 |
328.26 |
268.24 |
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Heptadecanoic |
Margaric |
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17 |
: |
0 |
17 |
270.26 |
327.29 |
253.25 |
269.25 |
848.78 |
596.54 |
579.54 |
344.29 |
284.27 |
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Octadecanoic |
Stearic |
S |
18 |
: |
0 |
18 |
284.27 |
341.31 |
267.27 |
283.26 |
890.83 |
624.57 |
607.57 |
358.31 |
298.29 |
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c-9-Octadecenoic |
Oleic (n-9) |
O |
18 |
: |
1 |
16 |
282.26 |
339.29 |
265.25 |
281.25 |
884.78 |
620.54 |
603.54 |
356.29 |
296.27 |
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t-9-Octadecenoic |
Elaidic |
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18 |
: |
1 |
16 |
282.26 |
339.29 |
265.25 |
281.25 |
884.78 |
620.54 |
603.54 |
356.29 |
296.27 |
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c-9,12-Octadecadienoic |
Linoleic (n-9) |
L |
18 |
: |
2 |
14 |
280.24 |
337.27 |
263.24 |
279.23 |
878.74 |
616.51 |
599.50 |
354.28 |
294.26 |
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c-6,9,12-Octadecatrienoic |
g-Linolenic (n-6) |
Ln |
18 |
: |
3 |
12 |
278.22 |
335.26 |
261.22 |
277.22 |
872.69 |
612.48 |
595.47 |
352.26 |
292.24 |
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Nonadecanoic |
----- |
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19 |
: |
0 |
19 |
298.29 |
355.32 |
281.28 |
297.28 |
932.88 |
652.60 |
635.60 |
372.32 |
312.30 |
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Eicosanoic |
Arachidic |
A |
20 |
: |
0 |
20 |
312.30 |
369.34 |
295.30 |
311.30 |
974.92 |
680.63 |
663.63 |
386.34 |
326.32 |
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c-9-Eicosenoic |
Gadoleic (n-11) |
G |
20 |
: |
1 |
18 |
310.29 |
367.32 |
293.28 |
309.28 |
968.88 |
676.60 |
659.60 |
384.32 |
324.30 |
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c-11-Eicosenoic |
Gondoic (n-9) |
Go |
20 |
: |
1 |
18 |
310.29 |
367.32 |
293.28 |
309.28 |
968.88 |
676.60 |
659.60 |
384.32 |
324.30 |
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c-8,11,14-Eicosatrienoic |
Homo-g-Linolenic (n-6) |
hL |
20 |
: |
3 |
14 |
306.26 |
363.29 |
289.25 |
305.25 |
956.78 |
668.54 |
651.54 |
380.29 |
320.27 |
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c-5,8,11,14-Eicosatetraenoic |
Arachidonic (n-6) |
Ao |
20 |
: |
4 |
12 |
304.24 |
361.27 |
287.24 |
303.23 |
950.74 |
664.51 |
647.50 |
378.28 |
318.26 |
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Heneicosanoic |
----- |
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21 |
: |
0 |
21 |
326.32 |
383.35 |
309.32 |
325.31 |
1016.97 |
708.66 |
691.66 |
400.36 |
340.33 |
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Docosanoic |
Behenic |
B |
22 |
: |
0 |
22 |
340.33 |
397.37 |
323.33 |
339.33 |
1059.02 |
736.69 |
719.69 |
414.37 |
354.35 |
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c-13-Docosenoic |
Erucic (n-9) |
E |
22 |
: |
1 |
20 |
338.32 |
395.35 |
321.32 |
337.31 |
1052.97 |
732.66 |
715.66 |
412.36 |
352.33 |
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Tetracosanoic |
Lignoceric |
Lg |
24 |
: |
0 |
24 |
368.37 |
425.40 |
351.36 |
367.36 |
1143.11 |
792.76 |
775.75 |
442.40 |
382.38 |
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c-15-Tetracosenoic |
Nervonic (n-9) |
N |
24 |
: |
1 |
22 |
366.35 |
423.38 |
349.35 |
365.34 |
1137.06 |
788.73 |
771.72 |
440.39 |
380.37 |