Lori Koch
Executive Vice President and Chief Financial Officer at DuPont de Nemours
Thanks, Ed, and good morning. Our focus remains on operational excellence and strong execution, and we are pleased to have delivered financial reports, ahead of expectations despite volume pressure in some of our most profitable lines of business and electronics.
Turning to our financial highlights on Slide 5five. Second quarter net sales of $3.1 billion decreased 7% as-reported and 4% on an organic basis versus the year-ago period. Currency results in a 1% headwind from dollar strength against key currencies, most notably the Yuan and Yen. And we also a 2% headwind related to portfolio changes.
Breaking down the 4% organic sales decline, FX percent volume declined, partially offset by a 2% pricing gain, reflecting continued carryover benefit of actions taken last year to offset broad-based inflation. Volume decline primarily reflects continued demand weakness in consumer electronics, coupled with inventory destocking across the channel and some softness, including destocking in North American construction-related market. Lower volume in consumer driven end-market was partially mitigated by continued strength in water, automotive, aerospace, and healthcare markets.
Volume within electronics and construction end-markets during the quarter was down mid-teens versus a year-ago period, while our remaining industrial base businesses were up about 4%. From a regional perspective, Europe sales in the quarter were up 4% on an organic basis, while North America and Asia Pacific were down 3% and 8% respectively versus the year-ago period. China sales were down 14% on an organic basis, driven mainly by electronic demand weakness, but increased sequentially versus the first quarter revenue.
Second quarter operating EBITDA of $738 million decreased 11% versus the year-ago period, driven by lower volumes and the impact of reduced production rates in electronics, as we align inventory with demand. Operating EBITDA margin during the quarter of 23.9% was down 110 basis points versus the year-ago period, driven by volume pressure, reduced production rates and mixed headwinds in high margin semi business. On a sequential basis, operating EBITDA and operating EBITDA margin were up from the first quarter.
Decremental margins for the for the quarter was 40%, excluding the impact of the production headwind related to reduce production rates within electronics, decremental margin was below 20%, enabled by aggressive actions taken year-to-date to reduced discretionary spend. Adjusted EPS in the quarter at $0.85 per share, but down 3% versus last year, which I will detail shortly.
Looking at cash performance, I would first like to highlight that we have made a reporting change effective with today's second quarter results, and are now providing cash flow disclosure separated between continuing and discontinued operations. This change is being made to improve visibility into cash flow generation and cash flow comparison of the ongoing.
On a continuing operations basis, cash flow from operations during the quarter up $400 million, that's capex of $123 million resulted in adjusted free cash flow of $277 million and associated conversion of 73%. This reflects significant improvement versus last year on a comparable basis, driven by lower inventory. Adjusted free cash flow included a benefit of about $80 million in reduced inventory and headwind of about $200 million related interest payment. Optimizing cash flow continues to be a top priority for us. While adjusted free cash flow and conversion improved sequentially, we still have work to do to get to our target level and expect further improvement in working capital metrics by year end.
Turning to Slide 6. Adjusted EPS for the quarter at $0.85 decreased 3% compared to $0.88 in the year-ago period. Lower segment results more than offset below-the-line benefits, including a $0.19 [Phonetic] benefit-related to lower net interest expense and a lower share count. Higher tax rate and exchange losses during the quarter resulted in adjusted EPS headwinds at $0.08 per share. Our tax rate for the quarter was 23.7%, up from 22.6% in the year-ago period, driven primarily by geographic mix of earnings.
Turning to segment results, beginning with E&I on Slide 7. E&I second quarter net sales at $1.3 billion decreased 14% as organic sales declined 12% due to lower-volume along with currency headwinds and unfavorable portfolio impact of 1% each. At the line of business level, volumes for semiconductor technologies decreased 19%, while interconnect solutions volume decreased 18% versus the the year-ago period. The decline in semi tech resulted from a continuation of lower semiconductor fab utilization rate, to weakened market demand as well as inventory destocking across the channel.
Chip fab utilization rate in the second quarter averaged in the low 70s on a percentage basis. The decline in interconnect was driven by continued weak smartphone, PC and tablet demand, along with channel inventory stocking. Our PCB customers in China operate in the second quarter with utilization rates slightly improved from the mid-40s during the first-quarter, which was a cycle now. The PCB market has been in slow down for a year now, and we are beginning to see signs of improvement within our interconnect business, illustrated by first and second quarter sequential growth of about 7%, with further expected sequential growth in the third quarter.
Sales for industrial solutions were flat on an organic basis as pricing and ongoing strength and broad-based industrial markets were offset by lower demand in largely consumer-driven areas, such as advanced printing application and those tied to electronic market, including OLED display. Operating EBITDA for E&I at $349 million was down versus a year-ago period, primarily due to volume decline and lower operating rates, to better align inventory with demand, partially offset by reduced discretionary spend.
Turning to Slide 8. W&P second quarter net sales of $1.5 billion were flat versus last year as organic sales growth of 1% was offset by a 1% currency headwinds. Organic growth of 1% reflects a 5% increase in price resulting from the carryover impact of pricing actions taken last year, mostly offset by a 4% decrease in segment volumes, this declined in shelter solutions. At the line of of business level, organic sales growth was led by water solution, which was up mid-teens. Our continued demand growth for water filtration led by reverse osmosis and [Indecipherable] along with benefits from carryover pricing.
Safety solutions sales were up mid single-digits on an organic basis, driven by carryover pricing and volume strength in Kevlar and Nomex within aerospace and automotive markets, especially for EVs, coupled with Tyvek strength in healthcare. Shelter solutions were down 12% on an organic basis, driven by demand softness in construction market as well as destocking, although we do expect a reduced impact from destocking in the second half. Operating EBITDA for W&P during the quarter was $368 million, up 6%, for operating EBITDA margin of 24.6%, increase of 140 basis points versus the year-ago period. The improvement resulted primarily from net pricing gain and disciplined cost-control, which more than offset volume decline.
Turning to Slide 9, I will close with a few comments on our outlook and guidance for the third quarter and full-year 2023. Regarding the demand environment, we continue to expect fairly steady demand in most of our industrial end-markets within E&I and W&P, although we expect sales moderation in our water business due to lower demand in China.
Within electronics, we saw stabilization and some [Indecipherable] in our interconnect solutions business with 7% sequential improvement in sale0 during the second quarter and we expect mid-single digit sequential growth to follow in the third quarter. We semi markets slightly bottomed during the second quarter, and we assume that net sales in the second half will improve slightly on a sequential basis. And then ongoing consumer electronics demand has been notably in China. We had tempered the rate of second half growth from prior assumption.
We are adjusting our full-year 2023 guidance to account for the slower cadence of recovery in electronics, including our assets to continue to reduce production to align inventory with demand. In addition, our third quarter and full-year guidance now includes the estimated contribution for Spectrum beginning August 1. For the full-year, we now expect net sales to be between $12.45 billion and $12.55 billion, operating EBITDA to be between $2.75 billion and $3.025 billion, and adjusted EPS to be between $3.40 and $3.50 per share. For the third quarter 2023, we expect revenue of approximately $3.15 billion, operating EBITDA of approximately $755 million, and adjusted EPS of approximately $0.84 per share.
With that, we are pleased to take your questions. And let me turn it back to the operator to open the Q&A.