I have looked around the Hive and Rhodiums and could not find any detailed S.G. data for Formic Acid.
I found this and hope this can help others.
If this info. is here, let me know and I'll delete this thread.
Specific Gravity of Formic Acid by Percent at 60 ºF
% Water %Formic Specific Gravity
100 0 1.0000
99 1 1.0022
98 2 1.0044
97 3 1.0066
96 4 1.0088
95 5 1.0110
94 6 1.0132
93 7 1.0154
92 8 1.0176
91 9 1.0198
90 10 1.0220
89 11 1.0242
88 12 1.0264
87 13 1.0268
86 14 1.0308
85 15 1.0330
84 16 1.0352
83 17 1.0374
82 18 1.0396
81 19 1.0418
80 20 1.0440
79 21 1.0462
78 22 1.0484
77 23 1.0506
76 24 1.0528
75 25 1.0550
74 26 1.0572
73 27 1.0594
72 28 1.0616
71 29 1.0638
70 30 1.0660
69 31 1.0682
68 32 1.0704
67 33 1.0726
66 34 1.0748
65 35 1.0770
64 36 1.0792
63 37 1.0814
62 38 1.0836
61 39 1.0858
60 40 1.0880
59 41 1.0902
58 42 1.0924
57 43 1.0946
56 44 1.0968
55 45 1.0990
54 46 1.1012
53 47 1.1034
52 48 1.1056
51 49 1.1078
50 50 1.1100
49 51 1.1122
48 52 1.1144
47 53 1.1166
46 54 1.1188
45 55 1.1210
44 56 1.1232
43 57 1.1254
42 58 1.1276
41 59 1.1298
40 60 1.1320
39 61 1.1342
38 62 1.1364
37 63 1.1386
36 64 1.1408
35 65 1.1430
34 66 1.1452
33 67 1.1474
32 68 1.1496
31 69 1.1518
30 70 1.1540
29 71 1.1562
28 72 1.1584
27 73 1.1606
26 74 1.1628
25 75 1.1650
24 76 1.1672
23 77 1.1694
22 78 1.1716
21 79 1.1738
20 80 1.1760
19 81 1.1782
18 82 1.1804
17 83 1.1826
16 84 1.1848
15 85 1.1870
14 86 1.1892
13 87 1.1914
12 88 1.1936
11 89 1.1958
10 90 1.1980
9 91 1.2002
8 92 1.2024
7 93 1.2046
6 94 1.2068
5 95 1.2090
4 96 1.2112
3 97 1.2134
2 98 1.2156 edit
1 99 1.2178
0 100 1.2200