Biacetyl (CH3C(O)C(O)CH3) absorption cross sections (1 bar, 298 K) Horowitz, A., R. Meller, and G. K. Moortgat, The UV-VIS absorption cross sectiono of the a-dicarbonyl compounds: pyruvic acid, biacetyl, and glyoxal. J. Photochem. Photobiol. A:Chemistry, v.146, pp.19-27, 2001. Quantum Yield Christopher N. Plum, Eugenlo Sanhueza, Roger Atkinson, William P. L. Carter and James N. Pitts Jr OH Radical Rate Constants and Photolysis Rates of a-Dicarbonyls Environ. Sci. Technol., Vol. 17, No. 8, 1983, p.479 phi (CH3CO + CH3CO) = 0.158 from 290 to 460 nm wavelength (nm) sigma (10**20 cm2 molecule-1) 206 10.30 207 9.860 208 9.140 209 7.970 210 6.740 211 5.820 212 5.180 213 4.700 214 4.290 215 3.900 216 3.550 217 3.210 218 2.900 219 2.580 220 2.260 221 1.960 222 1.700 223 1.500 224 1.350 225 1.270 226 1.230 227 1.240 228 1.280 229 1.340 230 1.410 231 1.470 232 1.530 233 1.590 234 1.680 235 1.800 236 1.920 237 2.090 238 2.150 239 2.210 240 2.290 241 2.390 242 2.540 243 2.690 244 2.800 245 2.890 246 2.940 247 2.990 248 3.050 249 3.150 250 3.310 251 3.480 252 3.600 253 3.680 254 3.730 255 3.750 256 3.780 257 3.840 258 3.940 259 4.090 260 4.270 261 4.410 262 4.460 263 4.490 264 4.490 265 4.480 266 4.490 267 4.540 268 4.630 269 4.810 270 4.950 271 5.000 272 4.980 273 3.920 274 4.850 275 4.760 276 4.700 277 4.680 278 4.670 279 4.680 280 4.710 281 4.730 282 4.650 283 4.500 284 4.320 285 4.140 286 3.940 287 3.770 288 3.620 289 3.500 290 3.380 291 3.280 292 3.200 293 3.110 294 2.960 295 2.730 296 2.500 297 2.290 298 2.100 299 1.930 300 1.770 301 1.640 302 1.540 303 1.460 304 1.380 305 1.320 306 1.270 307 1.210 308 1.100 309 0.950 310 0.815 311 0.707 312 0.616 313 0.539 314 0.480 315 0.438 316 0.405 317 0.380 318 0.360 319 0.344 320 0.334 321 0.331 322 0.321 323 0.295 324 0.261 325 0.232 326 0.212 327 0.200 328 0.194 329 0.193 330 0.196 331 0.203 332 0.212 333 0.199 334 0.216 335 0.231 336 0.245 337 0.263 338 0.284 339 0.296 340 0.298 341 0.318 342 0.346 343 0.365 344 0.387 345 0.412 346 0.442 347 0.469 348 0.499 349 0.534 350 0.565 351 0.607 352 0.650 353 0.683 354 0.729 355 0.771 356 0.815 357 0.864 358 0.916 359 0.966 360 1.020 361 1.080 362 1.190 363 1.260 364 1.330 365 1.410 366 1.490 367 1.570 368 1.660 369 1.760 370 1.850 371 1.940 372 2.020 373 2.100 374 2.170 375 2.250 376 2.330 377 2.410 378 2.500 379 2.580 380 2.680 381 2.790 382 2.920 383 3.070 384 3.220 385 3.390 386 3.530 387 3.670 388 3.820 389 4.000 390 4.170 391 4.340 392 4.470 393 4.560 394 4.620 395 4.670 396 4.730 397 4.820 398 4.920 399 5.020 400 5.120 401 5.190 402 5.260 403 5.380 404 5.540 405 5.750 406 6.000 407 6.260 408 6.470 409 6.590 410 6.690 411 6.820 412 6.970 413 7.110 414 7.310 415 7.470 416 7.570 417 7.620 418 7.510 419 7.390 420 7.370 421 7.320 422 7.250 423 7.240 424 7.130 425 6.980 426 6.810 427 6.570 428 6.430 429 6.340 430 6.310 431 6.400 432 6.630 433 6.780 434 6.780 435 6.720 436 6.560 437 6.400 438 6.420 439 6.280 440 6.510 441 6.670 442 6.990 443 7.230 444 6.850 445 6.490 446 5.900 447 5.430 448 5.010 449 4.330 450 4.060 451 3.440 452 3.200 453 2.650 454 2.160 455 1.720 456 1.390 457 1.140 458 0.853 459 0.726 460 0.549 461 0.454 462 0.356 463 0.280 464 0.219 465 0.179 466 0.143 467 0.118 468 0.096 469 0.081 470 0.069 471 0.059 472 0.051 473 0.044 474 0.040 475 0.035 476 0.031 477 0.028 478 0.025 479 0.023 480 0.021 481 0.019 482 0.018 483 0.017 484 0.016 485 0.015 486 0.015 487 0.015 488 0.015 489 0.016 490 0.018 491 0.019 492 0.021