GCMS analysis report for sample AE01507, March 2002

NYC 9/11 Public Portal Document Library Search Compound Report Data File : C:\MSDCHEM\1\5973N\02FEB21\01508.D Vial: 8 Acq On : 21 Feb 2002 9:01 pm Operator: Sample : 508 scan fb Inst : Instrumen Mise : February 21, 2002 Multiplr: 1.00 MS Integration Params: LSCINT.P Quant Method : C:\MSDCHEM\1...\HP022102 .M (RTE Integrator) Title : 508 scan method Library : C:\DATABASE\WILEY7N.L ********************************************************************* Peak Number 2 ISOBUTYRALDEHYDE, DIMETHYLA... Concentration Rank 7

R.T. EstConc Area Relative to ISTD R.T. 3.93 0.08 ug/L 38962 1,4-Dichlorobenzene-d4 9.72

Hit# of 5 Tentative ID MW MolForm CAS# Qual

1 ISOBUTYRALDEHYDE, DIMETHYLACETAL... 118 C6H14O2 000000-00-0 83 2 ISOBUTYRALDEHYDE, DIMETHYLACETAL... 118 C6H14O2 000000-00-0 64 3 Propane, 1,l-dimethoxy-2-methyl-... 118 C6H14O2 041632-89-7 64 4 Propane, 1,1-dimethoxy-2-methyl- 118 C6H1402 041632-89-7 64 Abundance Scan 49 (3.927 min): 01508.D (-) m/z 75.10 100.00% 75

5000 87 55 _ 1 ■ iA ■ ■'■1111111 1 1 1 1 1 ' 11 r 41 47 ob I “ “ I “ * ’ i “' • I ‘ •1 * I ’'" I niz-> 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 l 59 -.4. ■ ‘ i i ■ ■»■ I ■. ■ »I... ■ mmmp 84 m/z 3.60 3.80 87.10 4.00 4.20 32.68% Abundance #17848: ISOBUTYRALDEHYDE, DIMETHYLACETAL $$ 1 1-Dimethoxyi... 75

5000 • 1 i ‘ 1 ■ ■ i ■ • i ' ■ ■ ■ i ‘ ‘ ‘ i 87 3.60 3.80 4.00 4.20 15 55 m/z 55.10 23.07% 27 31 47 59 71 ob" ' ' I " " TIm—BBu—u—numr "I‘ 1 THH Hpn l-rp-n-rpT miz-> 5 10 15 20253035404550 55 6065 70 75 80859095 Abundance #17847: ISOBUTYRALDEHYDE, DIMETHYLACETAL $$ 1 1-Dimethoxyi... 75 T T 3.60 4.00 4.20 3.80 m/z 47.00 16.10% 5000

47 55 87 n 31 431 59 71 ob i1 ■1 ■ i ■ ■ ■ ■ i ■ ■ ■ ■ i ■ ■1 ■ i1 ■111 ■ ■ ■ ‘ i -H "d11' >i'"i1"1 Isurpur miz-> 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Abundance #17844: Propane, 1,1-dimethoxy-2-methyl-$$ Isobutylaldehy... ' 1 I ' ■ ‘ ■ i ‘ ■ i 75 3.60 3.80 4.00 4.20 m/z41.10 11.68%

5000 87 31 47 55 - 43, 59 71 iz—> 0 nayuilaa TIpHp 111" “ 11"' —poy 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 +rTTTTTTTT ■ ।11 ■ • 1 ■ ■1 ■ 11111111 ■11 3.60 3.80 4.00 4.20

91508.D HP022102.M Mon Feb 25 10:54:56 2002 Page 4

NYC-WTC_000009993