3857. Dilute Sulphuric Acid

3857.     Dilute Sulphuric Acid. The officinal strength of this acid, according to the U. S. Pharmacopoeia, is thus obtained: Take 2 troy ounces sulphuric acid; add gradually to it 14 fluid ounces distilled water; filter through paper, and pass sufficient distilled water through the filter to make the diluted acid measure 1 pint. The specific gravity of this mixture is 1.082. The officinal strength of the British Pharmacopoeia is somewhat greater; sufficient distilled water is added to 1350 grains sulphuric acid, so that, after it has been shaken and cooled down to

60° Fahr., it measures 1 imperial pint. The specific gravity of this is 1.094.

3858. Nordhausen Sulphuric Acid

3858.     Nordhausen Sulphuric Acid. This is also known as fuming sulphuric acid. It is a brown, oily liquid, which fumes in the air, is intensely corrosive, and has a specific gravity of about 1.900, and is chiefly used for dissolving indigo. It is prepared by distilling calcined sulphate of iron (green vitriol) in an earthen retort.

3859. Table Showing the Percentage of Liquid and Dry Sulphuric Acid in Dilute Acid at Different Densities

3859.  Table Showing the Percentage of Liquid and Dry Sulphuric Acid in Dilute Acid at Different Densities.

Liquid.

Sp. Gr.

Dry.

Liquid.

Sp. Gr.

Dry.

100

1.8485

81.54

50

1.3884

40.77

99

1.8475

80.72

49

1.3788

39.95

98

1.8460

79.90

48

1.3697

39.14

97

1.8439

79.09

47

1.3612

38.32

96

1.8410

78.28

46

1.3530

37.51

95

1.8376

77.46

45

1.3440

36.69

94

1.8336

76.65

44

1.3345

35.88

93

1.8290

75.83

43

1.3255

35.06

92

1.8233

75.02

42

1.3165

34.25

91

1.8179

74.20

41

1.3080

33.43

90

1.8115

73.39

40

1.2999

32.61

89

1.8043

72.57

39

1.2913

31.80

88

1.7962

71.75

38

1.2826

30.98

87

1.7870

70.94

37

1.2740

30.17

86

1.7774

70.12

36

1.2654

29.35

85

1.7673

69.31

35

1.2572

28.54

84

1.7570

68.49

34

1.2490

27.72

83

1.7465

67.68

33

1.2409

26.91

82

1.7360

66.86

32

1.2334

26.09

81

1.7245

66.05

31

1.22G0

25.28

80

1.7120

65.23

30

1.2184

24.46

79

1.6993

64.42

29

1.2108

23.65

78

1.6870

63.60

28

1.2032

22.83

77

1.6750

62.78

27

1.1956

22.01

76

1.6630

61.97

26

1.1876

21.20

75

1.6520

61.15

25

1.1792

20.38

74

1.6415

60.34

24

1.1706

19.57

73

1.6321

59.52

23

1.1626

18.75

72

1.6204

58.71

22

1.1549

17.94

71

1.6090

57.89

21

1.1480 17.12

70

1.5975

57.08

20

1.1410

16.31

69

1.5868

56.26

19

1.1330

15.49

68

1.5760

55.45

18

1.1246

14.68

67

1.5648

54.63

17

1.1165

13.86

66

1.5503

53.82

16

1.1090

13.05

65

1.5390

53.00

15

1.1019

12.23

64

1.5280

52.18

14

1.0953

11.60

63

1.5170

51.37

13

1.0887

10.41

62

1.5066

50.55

12

1.0809

9.78

61

1.49G0

49.74

11

1.0743

8.97

60

1.48G0

48.92

10

1.0682

8.15

59

1.4760

48.11

9

1.0614

7.34

58

1.4G60

47.29

8

1.0544

6.52

57

1.4560

46.48

7

1.0477

5.71

56

1.44G0

45.66

6

1.0405

4.89

55

1.4360

44.85

5

1.0336

4.08

54

1.4265

44.03

4

1.0268

3.26

53

1.4170

43.22

3

1.0206

2.446

52

1.4073

42.40

2

1.0140

1.63

51

1.3977

41.58

1

1.0074

0.8154