To convert this data to absorbance A=-log10(T), multiply by the molar concentration and the pathlength in centimeters. To convert this data to absorption coefficient in (cm-1), multiply by the molar concentration and 2.303.
lambda Extinction nm cm-1/M 255.50 82645 255.75 81795 256.00 80219 256.25 80055 256.50 79170 256.75 79546 257.00 77765 257.25 76722 257.50 74461 257.75 71795 258.00 66345 258.25 60752 258.50 55303 258.75 49277 259.00 43575 259.25 39108 259.50 34865 259.75 31230 260.00 28099 260.25 25288 260.50 22854 260.75 20773 261.00 18980 261.25 17450 261.50 16031 261.75 14902 262.00 13759 262.25 12840 262.50 11952 262.75 11189 263.00 10541 263.25 9861 263.50 9295 263.75 8781 264.00 8308 264.25 7921 264.50 7497 264.75 7155 265.00 6769 265.25 6463 265.50 6185 265.75 5911 266.00 5655 266.25 5415 266.50 5202 266.75 5024 267.00 4814 267.25 4662 267.50 4485 267.75 4326 268.00 4158 268.25 4063 268.50 3888 268.75 3779 269.00 3655 269.25 3535 269.50 3425 269.75 3296 270.00 3211 270.25 3120 270.50 3015 270.75 2958 271.00 2859 271.25 2798 271.50 2739 271.75 2659 272.00 2570 272.25 2465 272.50 2438 272.75 2376 273.00 2332 273.25 2294 273.50 2258 273.75 2210 274.00 2164 274.25 2066 274.50 2040 274.75 2000 275.00 1918 275.25 1907 275.50 1870 275.75 1845 276.00 1813 276.25 1766 276.50 1771 276.75 1752 277.00 1698 277.25 1701 277.50 1678 277.75 1639 278.00 1612 278.25 1634 278.50 1609 278.75 1645 279.00 1626 279.25 1602 279.50 1581 279.75 1589 280.00 1580 280.25 1608 280.50 1592 280.75 1591 281.00 1571 281.25 1601 281.50 1566 281.75 1621 282.00 1580 282.25 1573 282.50 1535 282.75 1568 283.00 1549 283.25 1550 283.50 1506 283.75 1478 284.00 1498 284.25 1517 284.50 1523 284.75 1543 285.00 1517 285.25 1491 285.50 1497 285.75 1464 286.00 1491 286.25 1467 286.50 1464 286.75 1458 287.00 1443 287.25 1558 287.50 1510 287.75 1497 288.00 1527 288.25 1552 288.50 1532 288.75 1616 289.00 1580 289.25 1645 289.50 1652 289.75 1710 290.00 1751 290.25 1743 290.50 1801 290.75 1898 291.00 1942 291.25 2000 291.50 2063 291.75 2105 292.00 2124 292.25 2248 292.50 2238 292.75 2321 293.00 2389 293.25 2456 293.50 2502 293.75 2593 294.00 2681 294.25 2696 294.50 2742 294.75 2751 295.00 2788 295.25 2798 295.50 2837 295.75 2870 296.00 2899 296.25 2867 296.50 2913 296.75 2966 297.00 2957 297.25 2935 297.50 2989 297.75 2957 298.00 2974 298.25 2964 298.50 2947 298.75 2994 299.00 2983 299.25 2998 299.50 2954 299.75 3034 300.00 3082 300.25 3149 300.50 3141 300.75 3249 301.00 3306 301.25 3444 301.50 3492 301.75 3540 302.00 3649 302.25 3739 302.50 3892 302.75 4031 303.00 4143 303.25 4279 303.50 4515 303.75 4661 304.00 4831 304.25 4978 304.50 5197 304.75 5319 305.00 5543 305.25 5643 305.50 5844 305.75 6023 306.00 6177 306.25 6280 306.50 6503 306.75 6664 307.00 6841 307.25 7049 307.50 7192 307.75 7321 308.00 7459 308.25 7537 308.50 7569 308.75 7663 309.00 7736 309.25 7749 309.50 7806 309.75 7732 310.00 7378 310.25 7571 310.50 7257 310.75 7362 311.00 7174 311.25 7138 311.50 6924 311.75 7137 312.00 7023 312.25 6913 312.50 7046 312.75 6775 313.00 7044 313.25 7067 313.50 7154 313.75 7059 314.00 6970 314.25 7169 314.50 7398 314.75 7342 315.00 7671 315.25 7825 315.50 7855 315.75 7893 316.00 8399 316.25 8728 316.50 8959 316.75 9263 317.00 9604 317.25 9871 317.50 10252 317.75 10699 318.00 10978 318.25 11352 318.50 11395 318.75 11961 319.00 12274 319.25 12552 319.50 12883 319.75 13337 320.00 13351 320.25 13732 320.50 13998 320.75 14429 321.00 14829 321.25 15051 321.50 15545 321.75 15820 322.00 16320 322.25 16481 322.50 16840 322.75 16845 323.00 17245 323.25 17554 323.50 17404 323.75 17403 324.00 17423 324.25 17152 324.50 16975 324.75 16893 325.00 16599 325.25 16111 325.50 15910 325.75 15636 326.00 15187 326.25 14923 326.50 14747 326.75 14387 327.00 14181 327.25 13937 327.50 13766 327.75 13480 328.00 13431 328.25 13283 328.50 13229 328.75 13370 329.00 13412 329.25 13409 329.50 13336 329.75 13615 330.00 13712 330.25 13884 330.50 13948 330.75 14246 331.00 14419 331.25 14475 331.50 14964 331.75 15189 332.00 15796 332.25 16293 332.50 16930 332.75 17522 333.00 18331 333.25 19271 333.50 20001 333.75 20790 334.00 21612 334.25 22121 334.50 22583 334.75 22897 335.00 23510 335.25 24049 335.50 24186 335.75 24335 336.00 24941 336.25 25303 336.50 25936 336.75 26442 337.00 26967 337.25 27731 337.50 28316 337.75 29153 338.00 30375 338.25 31189 338.50 31725 338.75 32491 339.00 32847 339.25 33111 339.50 33645 339.75 32928 340.00 32625 340.25 32010 340.50 31247 340.75 30874 341.00 29521 341.25 28523 341.50 27597 341.75 26860 342.00 25582 342.25 24688 342.50 23874 342.75 22950 343.00 22111 343.25 21292 343.50 20561 343.75 20095 344.00 19726 344.25 19164 344.50 18599 344.75 18552 345.00 18341 345.25 18232 345.50 17884 345.75 18049 346.00 18060 346.25 17950 346.50 18037 346.75 18150 347.00 18186 347.25 18375 347.50 18312 347.75 18656 348.00 18770 348.25 19212 348.50 19763 348.75 20335 349.00 21242 349.25 22195 349.50 23405 349.75 24496 350.00 25720 350.25 26960 350.50 28602 350.75 29662 351.00 30811 351.25 31682 351.50 32414 351.75 32882 352.00 33466 352.25 33781 352.50 34303 352.75 34384 353.00 34691 353.25 34802 353.50 35566 353.75 36064 354.00 37297 354.25 38751 354.50 39703 354.75 41494 355.00 42785 355.25 44258 355.50 45362 355.75 46543 356.00 46911 356.25 47000 356.50 46676 356.75 46399 357.00 45678 357.25 44660 357.50 42786 357.75 41753 358.00 39780 358.25 37734 358.50 35626 358.75 33895 359.00 31906 359.25 30127 359.50 28224 359.75 26586 360.00 25100 360.25 23779 360.50 22287 360.75 21042 361.00 19906 361.25 18696 361.50 17812 361.75 17070 362.00 16049 362.25 15409 362.50 14758 362.75 14297 363.00 13843 363.25 13593 363.50 13294 363.75 12959 364.00 12858 364.25 12662 364.50 12461 364.75 12336 365.00 12181 365.25 12038 365.50 11940 365.75 11825 366.00 11772 366.25 11870 366.50 11976 366.75 12223 367.00 12514 367.25 13009 367.50 13695 367.75 14579 368.00 15562 368.25 16726 368.50 18012 368.75 19111 369.00 20513 369.25 21513 369.50 22654 369.75 23282 370.00 24167 370.25 24373 370.50 24790 370.75 24763 371.00 24672 371.25 24493 371.50 24418 371.75 24317 372.00 24641 372.25 24913 372.50 25678 372.75 26656 373.00 28075 373.25 29554 373.50 31493 373.75 33214 374.00 34941 374.25 36298 374.50 37318 374.75 37758 375.00 38346 375.25 39092 375.50 39612 375.75 40226 376.00 41646 376.25 42148 376.50 42104 376.75 40866 377.00 39199 377.25 37278 377.50 34792 377.75 32048 378.00 29308 378.25 26367 378.50 23747 378.75 21042 379.00 18401 379.25 16484 379.50 14575 379.75 12799 380.00 11430 380.25 10204 380.50 9142 380.75 8254 381.00 7500 381.25 6805 381.50 6246 381.75 5761 382.00 5344 382.25 4817 382.50 4435 382.75 4137 383.00 3650 383.25 3386 383.50 3040 383.75 2762 384.00 2540 384.25 2277 384.50 2046 384.75 1860 385.00 1675 385.25 1614 385.50 1481 385.75 1387 386.00 1214 386.25 1179 386.50 1141 386.75 1037 387.00 891 387.25 879 387.50 895 387.75 822 388.00 732 388.25 730 388.50 653 388.75 626 389.00 634 389.25 551 389.50 524 389.75 503 390.00 430 390.25 480 390.50 477 390.75 415 391.00 458 391.25 401 391.50 439 391.75 366 392.00 283 392.25 321 392.50 364 392.75 295 393.00 283 393.25 216 393.50 244 393.75 248 394.00 293 394.25 179 394.50 155 394.75 165 395.00 184 395.25 123 395.50 193 395.75 120 396.00 102 396.25 183 396.50 191 396.75 162 397.00 83 397.25 84 397.50 117 397.75 54 398.00 122 398.25 62 398.50 85 398.75 109 399.00 5 399.25 18 399.50 62 399.75 15 400.00 56 400.25 73 400.50 16 400.75 44 401.00 58 401.25 25 401.50 39 401.75 72 402.00 51 402.25 0 402.50 14 402.75 0 403.00 0 403.25 74 403.50 0 403.75 2 404.00 19 404.25 0 404.50 0 404.75 0 405.00 0 405.25 30 405.50 0 405.75 0 406.00 0 406.25 0 406.50 0 406.75 45 407.00 0 407.25 0 407.50 0 407.75 0 408.00 0 408.25 0 408.50 0 408.75 0 409.00 0 409.25 0 409.50 0 409.75 0 410.00 0 410.25 0 410.50 15 410.75 0 411.00 22 411.25 0 411.50 0 411.75 0 412.00 0 412.25 0 412.50 0 412.75 0 413.00 0 413.25 0 413.50 0 413.75 0 414.00 0 414.25 0 414.50 0 414.75 0 415.00 0 415.25 2 415.50 0 415.75 0 416.00 2 416.25 27 416.50 1 416.75 0 417.00 0 417.25 0 417.50 0 417.75 0 418.00 0 418.25 0 418.50 29 418.75 0 419.00 0 419.25 0 419.50 0 419.75 0 420.00 0 420.25 0 420.50 0 420.75 0 421.00 0 421.25 0 421.50 0 421.75 0 422.00 0 422.25 0 422.50 0 422.75 0 423.00 0 423.25 0 423.50 0 423.75 0 424.00 0 424.25 0 424.50 0 424.75 0 425.00 0 425.25 0 425.50 0 425.75 0 426.00 0 426.25 0 426.50 0 426.75 0 427.00 0 427.25 0 427.50 0 427.75 0 428.00 0 428.25 0 428.50 48 428.75 0 429.00 0 429.25 0 429.50 0 429.75 0 430.00 0 430.25 0 430.50 0 430.75 0 431.00 0 431.25 0 431.50 0 431.75 0 432.00 0 432.25 0 432.50 4 432.75 0 433.00 0 433.25 0 433.50 0 433.75 0 434.00 0 434.25 0 434.50 0 434.75 0 435.00 0 435.25 0 435.50 0 435.75 0 436.00 0 436.25 0 436.50 0 436.75 0 437.00 0 437.25 0 437.50 0 437.75 0 438.00 0 438.25 0 438.50 0 438.75 0 439.00 0 439.25 0 439.50 0 439.75 0 440.00 0 440.25 0 440.50 0 440.75 0 441.00 0 441.25 0 441.50 0 441.75 0 442.00 0 442.25 0 442.50 0 442.75 0 443.00 0 443.25 0 443.50 0 443.75 0 444.00 0 444.25 0 444.50 0 444.75 0 445.00 0 445.25 0 445.50 0 445.75 0 446.00 0 446.25 0 446.50 0 446.75 0 447.00 0 447.25 0 447.50 0 447.75 0 448.00 0 448.25 0 448.50 0 448.75 0 449.00 0 449.25 0 449.50 0 449.75 0 450.00 0 450.25 0 450.50 0 450.75 0 451.00 0 451.25 0 451.50 0 451.75 0 452.00 0 452.25 0 452.50 0 452.75 0 453.00 0 453.25 0 453.50 0 453.75 0 454.00 0 454.25 0 454.50 0 454.75 0 455.00 0 455.25 0 455.50 0 455.75 0 456.00 0 456.25 0 456.50 0 456.75 0 457.00 0 457.25 0 457.50 0 457.75 0 458.00 0 458.25 0 458.50 0 458.75 0 459.00 0 459.25 0 459.50 0 459.75 0 460.00 0 460.25 0 460.50 0 460.75 0 461.00 0 461.25 0 461.50 0 461.75 0 462.00 0 462.25 0 462.50 0 462.75 0 463.00 0 463.25 0 463.50 0 463.75 0 464.00 0 464.25 0 464.50 0 464.75 0 465.00 0 465.25 0 465.50 0 465.75 0 466.00 0 466.25 0 466.50 0 466.75 0 467.00 0 467.25 0 467.50 0 467.75 0 468.00 0 468.25 0 468.50 0 468.75 0 469.00 0 469.25 0 469.50 0 469.75 0 470.00 0 470.25 0 470.50 0 470.75 0 471.00 0 471.25 0 471.50 0 471.75 0 472.00 0 472.25 0 472.50 0 472.75 0 473.00 0 473.25 0 473.50 0 473.75 0 474.00 0 474.25 0 474.50 0 474.75 0 475.00 0 475.25 0 475.50 0 475.75 0 476.00 0 476.25 0 476.50 0 476.75 0 477.00 0 477.25 0 477.50 0 477.75 0 478.00 0 478.25 0 478.50 0 478.75 0 479.00 0 479.25 0 479.50 0 479.75 0 480.00 0 480.25 0 480.50 0 480.75 0 481.00 0 481.25 0 481.50 0 481.75 0 482.00 0 482.25 0 482.50 0 482.75 0 483.00 0 483.25 0 483.50 0 483.75 0 484.00 0 484.25 0 484.50 0 484.75 0 485.00 0 485.25 0 485.50 0 485.75 0 486.00 0 486.25 0 486.50 0 486.75 0 487.00 0 487.25 0 487.50 0 487.75 0 488.00 0 488.25 0 488.50 0 488.75 0 489.00 0 489.25 0 489.50 0 489.75 0 490.00 0 490.25 0 490.50 0 490.75 0 491.00 0 491.25 0 491.50 0 491.75 0 492.00 0 492.25 0 492.50 0 492.75 0 493.00 0 493.25 0 493.50 0 493.75 0 494.00 0 494.25 0 494.50 0 494.75 0 495.00 0 495.25 0 495.50 0 495.75 0 496.00 0 496.25 0 496.50 0 496.75 0 497.00 0 497.25 0 497.50 0 497.75 0 498.00 0 498.25 0 498.50 0 498.75 0 499.00 0 499.25 0 499.50 0 499.75 0 500.00 0