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液堿即液態(tài)狀的氫氧化鈉，亦稱燒堿、苛性鈉。燒堿的工業(yè)品有液體和固體，其中液體為不同含量的氫氧化鈉水溶液；固體白色不透明，常制成片、棒、粒狀，或熔融態(tài)以鐵桶包裝。
純品為無色透明液體。相對密度2.130，熔點318.4℃，沸點1390℃。
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密度 (20℃ )
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質(zhì)量分數(shù)g/100g
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量濃度 (mol/L)
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密度 (20℃ )
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質(zhì)量分數(shù)g/100g
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量濃度 (mol/L)
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1.000
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0.159
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0.0393
|
1.270
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24.645
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7.824
|
|
1.005
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0.602
|
0.151
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1.275
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25.10
|
8.000
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|
1.010
|
1.045
|
0.264
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1.280
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25.56
|
8.178
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|
1.015
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1.49
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0.378
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1.285
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26.02
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8.357
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|
1.020
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1.94
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0.494
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1.290
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26.48
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8.0539
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|
1.025
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2.39
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0.611
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1.295
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26.94
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8.722
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|
1.030
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2.84
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0.731
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1.300
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27.41
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8.906
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|
1.035
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3.29
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0.851
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1.305
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27.87
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9.092
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|
1.040
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3.745
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0.971
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1.310
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28.33
|
9.278
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|
1.045
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4.20
|
1.097
|
1.315
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28.80
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9.466
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|
1.050
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4.655
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1.222
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1.320
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29.26
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9.656
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|
1.055
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5.11
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1.347
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1.325
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29.73
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9.847
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|
1.060
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5.56
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1.474
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1.330
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30.20
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10.04
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|
1.065
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6.02
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1.602
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1.335
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30.67
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10.23
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|
1.070
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6.47
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1.731
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1.340
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31.14
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10.43
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|
1.075
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6.93
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1.862
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1.345
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31.62
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10.63
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|
1.080
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7.38
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1.992
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1.350
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32.10
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10.83
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|
1.085
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7.83
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2.123
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1.355
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32.58
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11.03
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1.090
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8.28
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2.257
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1.360
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33.06
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11.24
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|
1.095
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8.74
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2.391
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1.365
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33.54
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11.45
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|
1.100
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9.19
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2.527
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1.370
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34.03
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11.65
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1.105
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9.645
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2.664
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1.375
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34.52
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11.86
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1.110
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10.10
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2.802
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1.380
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35.01
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12.08
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|
1.115
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10.555
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2.942
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1.385
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35.50
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12.29
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|
1.120
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11.01
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3.082
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1.390
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36.00
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12.51
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|
1.125
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11.46
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3.224
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1.395
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36.495
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12.73
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1.130
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11.92
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3.367
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1.400
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36.99
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12.95
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|
1.135
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12.37
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3.510
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1.405
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37.49
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13.17
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|
1.140
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12.83
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3.655
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1.410
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37.99
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13.30
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|
1.145
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13.28
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3.801
|
1.415
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38.49
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13.61
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|
1.150
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13.73
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3.947
|
1.420
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38.99
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13.84
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|
1.155
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14.18
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4.095
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1.425
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39.495
|
14.07
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|
1.160
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14.64
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4.244
|
1.430
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40.00
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14.30
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|
1.165
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15.09
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4.395
|
1.435
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40.515
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14.53
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|
1.170
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15.54
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4.545
|
1.440
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41.03
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14.77
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|
1.175
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15.99
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4.697
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1.445
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41.55
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15.01
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|
1.180
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16.44
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4.850
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1.450
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42.07
|
15.25
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|
1.185
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16.89
|
5.004
|
1.455
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42.59
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15.49
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|
1.190
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17.345
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5.160
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1.460
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43.12
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15.74
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|
1.195
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17.80
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5.317
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1.465
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43.64
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15.98
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|
1.200
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18.255
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5.476
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1.470
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44.17
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16.23
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|
1.205
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18.71
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5.636
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1.475
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44.695
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16.48
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|
1.210
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19.16
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5.796
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1.480
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45.22
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16.73
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|
1.215
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19.62
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5.958
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1.485
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45.75
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16.98
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|
1.220
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20.07
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6.122
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1.490
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46.27
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17.28
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|
1.225
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20.53
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6.286
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1.495
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46.80
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17.49
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|
1.230
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20.98
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6.451
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1.500
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47.23
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17.75
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|
1.235
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21.44
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6.619
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1.505
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47.85
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18.00
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|
1.240
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21.90
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6.788
|
1.510
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48.88
|
18.20
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|
1.245
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22.30
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6.958
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1.515
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48.905
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18.52
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|
1.250
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22.82
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7.129
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1.520
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49.44
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18.78
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|
1.255
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23.275
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7.302
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1.525
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49.97
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19.05
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|
1.260
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23.73
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7.475
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1.530
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50.50
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19.31
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|
1.265
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24.19
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7.650
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