K983585 · Central Solutions, Inc. · LRJ · Nov 6, 1998 · General Hospital
Device Facts
Record ID
K983585
Device Name
LOW PH PHENOLIC 256
Applicant
Central Solutions, Inc.
Product Code
LRJ · General Hospital
Decision Date
Nov 6, 1998
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 880.6890
Device Class
Class 1
Indications for Use
This product is not to be used as a terminal sterilant/high-level disinfectant on any surface or instrument that (1) is introduced directly into the human body, either into or in contact with the bloodstream or normally sterile areas of the body, or (2) contacts intact mucous membranes but which does not ordinarily penetrate the blood barrier or otherwise enter normally sterile areas of the body. This product may be used to preclean or decontaminate critical medical devices prior to sterlization or high-level disinfection.
Device Story
Low pH Phenolic 256 is a liquid germicidal detergent for cleaning, disinfecting, and deodorizing hard, non-porous surfaces in healthcare institutions. Used by hospital staff and healthcare personnel to control cross-contamination. Applied to environmental surfaces (e.g., bed frames, examination tables, stethoscopes) and for pre-cleaning medical devices. Operates as a chemical disinfectant; effective against Mycobacterium tuberculosis, Staphylococcus aureus, Salmonella cholerasuis, Pseudomonas aeruginosa, Trichophyton mentagrophytes, and HIV-1 in the presence of 5% organic soil. Healthcare providers apply the solution to surfaces to reduce pathogen transmission risk; benefits include maintaining sanitary clinical environments and preventing cross-contamination.
Clinical Evidence
Bench testing only. Efficacy demonstrated via A.O.A.C. testing in hard water (up to 400 ppm) with 5% organic soil load. Effective as a bactericide, virucide, and fungicide at 20°C with a 10-minute contact time.
Technological Characteristics
Activated synthetic phenolic base disinfectant cleaner. Concentrate contains 14.735% phenolics. pH of concentrate: 2.25 ± 0.50; pH of use-dilution: 3.50 ± 0.50. Specific gravity: 1.089 ± 0.01. Flash point: None. Phosphate-free. Liquid form.
Indications for Use
Indicated for low and intermediate level disinfection of hard, non-porous surfaces in healthcare settings, including wheelchairs, medical beds, patient transfer lifts, crutches, instrument trays, operating tables, dental chairs, medical lamps, and whirlpool units. May be used to preclean or decontaminate critical or non-critical medical devices prior to sterilization or high-level disinfection.
Regulatory Classification
Identification
A general purpose disinfectant is a germicide intended to process noncritical medical devices and equipment surfaces. A general purpose disinfectant can be used to preclean or decontaminate critical or semicritical medical devices prior to terminal sterilization or high level disinfection. Noncritical medical devices make only topical contact with intact skin.
Submission Summary (Full Text)
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Image /page/0/Picture/0 description: The image shows a logo with the text "CENTRAL SOLUTIONS INC" in bold, black letters. Above the text is a black circle with a white teardrop shape inside. To the right of the logo, the text "NOV 6 1998" is printed in a smaller, less bold font.
DISINFECTANT CATEGORY:
FRHOFF RD. KANSAS 66115
Formulation . Development . Production
## 510(k) SUMMARY
1983585
| SUBMITTER: | Central Solutions, Inc.<br>3130 Brinkerhoff Road<br>P.O. Box 15276<br>Kansas City, KS 66115<br>Tel: (913) 621-6542 | CONTACT PERSON: | Paul Nobrega |
|--------------------------------|--------------------------------------------------------------------------------------------------------------------|------------------------------|-----------------|
| | | DATE PREPARED: | August 27, 1998 |
| DEVICE TRADE / PROPRIETY NAME: | | Low pH Phenolic 256 | |
| DEVICE COMMON / USUAL NAME: | | General Purpose Disinfectant | |
| CLASSIFICATION NAME: | | Unclassified | |
This product is not to be used as a terminal sterilant/high-level disinfectant on any surface or instrument that (1) is introduced directly into the human body, either into or in contact with the bloodstream or normally sterile areas of the body, or (2) contacts intact mucous membranes but which does not ordinarily penetrate the blood barrier or otherwise enter normally sterile areas of the body. This product may be used to preclean or decontaminate critical medical devices prior to sterlization or high-level disinfection.
Intermediate Level General Purpose Disinfectant
## USE, FUNCTIONS, CONCEPTS, AND PERFORMANCE CHARACTERISTICS OF DEVICE:
Low pH Phenolic 256 is a liquid germicidal detergent formulated to clean, disinfect, and deodorize any washable, non-porous surface in one easy step. Low pH Phenolic 256 is recommended for use by hospitals, nursing homes, and other health care institutions that are dedicated to controlling cross-contamination in their establishments. Low pH Phenolic 256 is for use on any hard, inanimate surfaces such as door handles, medical bed surfaces, springs, wheelchairs, walls, floors, light switches, linen carts, stretcher wheels, toilet bowl surfaces, showers, bathtubs, bed frames, patient transfer lifts, patient scales, examination tables, dental chairs, stethoscopes, bedpans, blood donor chairs, and other hard, non-porous surfaces that need disinfection.
Efficacy tests have demonstrated that this product is an effective bactericide, and virucide in the presence of organic soil (5% blood serum). When used as directed, Low pH Phenolic 256 demonstrates effective disinfectant efficacy against Mycobacterium tuberculosis (BCG) at 20℃, Staphylococcus aureus, Salmonella cholerasuis, and Pseudomonas aeruginosa. Low pH Phenolic 256 is fungicidal against the pathogenic fungi, Trichophyton mentagrophytes (Athlete's Foot Fungus) when used as directed on hard surfaces found in bathrooms, shower stalls, locker rooms, or other clean, non-porous, hard surfaces commonly contacted by bare feet. This product, when used on environmental, inanimate, non-porous surfaces, exhibits effective virucidal activity against HIV-1 (associated with AIDS). HIV-1 (AIDS Virus) on pre-cleaned environmental surfaces/objects previously soiled with blood/body fluids in health care settings in which there is an expected likelihood of soiling of inanimate surfaces/objects with blood or body fluids, and in which the surfaces/objects likely to be soiled with blood or body fluids can be associated with the potential for transmission of human immunodeficiency virus Type-1 (HIV-1) (associated with AIDS).
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Image /page/1/Picture/0 description: The image shows the logo for Central Solutions, Inc. The logo consists of a stylized letter "C" with a water droplet inside. The text "CENTRAL SOLUTIONS, INC." is written in bold, sans-serif font below the logo.
3130 BRINKERHOFF RD. P.O. BOX 15276 KANSAS CITY, KANSAS 66115 (913) 621-6542
Formulation • Development • Production
# 510(k) Summary - Page 2
## SCIENTIFIC PHYSICAL CHARACTERISTICS OF DEVICE:
| Product Designation: | Activated Synthetic Phenolic Base Disinfectant Cleaner |
|---------------------------|---------------------------------------------------------------------------------|
| Appearance (Concentrate): | Clear light amber liquid |
| Odor: | Slight alcohol |
| Percent of Phenolics: | Concentrate: 14.735% |
| pH (concentrate): | 2.25 ± 0.50 |
| pH (use-dilution): | 3.50 ± 0.50 |
| Specific Gravity (25°C): | 1.089 ± 0.01 |
| Flash Point: | None |
| Detergency: | Excellent |
| Phosphate Content: | None |
| Testing: | A.O.A.C. in Hard Water up to 400 ppm in the presence of<br>5% organic soil load |
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Image /page/2/Picture/1 description: The image contains the text "Public Health Service". The text is in a simple, sans-serif font and is horizontally aligned. The words are stacked on top of each other.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
6 1998 NOV
Mr. Paul J. Nobrega Registration Specialist Dental Solutions, Incorporated 3130 Brinkerhoff Road P.O. Box 15276 Kansas City, Kansas 66115
Re : K983585 Trade Name: Low pH Phenolic 256/Cen-pHene Regulatory Class: Unclassified Product Code: LRJ Dated: Auqust 27, 1998 October 13, 1998 Received:
Dear Mr. Nobrega:
We have reviewed your Section 510(k) notification of intent to market the device referenced above and we have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act). You may, therefore, market the device, subject to the general controls provisions of the Act. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration.
If your device is classified (see above) into either class II (Special Controls) or class III (Premarket Approval), it may be subject to such additional controls. Existing major requlations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 895. A substantially equivalent determination assumes compliance with the Current Good Manufacturing Practice requirements, as set forth in the Quality System Requlation (QS) for Medical General requlation (21 CFR Part 820) and that, Devices: through periodic QS inspections, the Food and Drug Administration (FDA) will verify such assumptions. Failure to comply with the GMP regulation may result in regulatory In addition, FDA may publish further announcements action. concerning your device in the Federal Register. Please note: this response to your premarket notification submission does not affect any obligation you might have under sections 531
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Page 2 - Mr. Nobrega
through 542 of the Act for devices under the Electronic Product Radiation Control provisions, or other Federal laws or requlations.
This letter will allow you to begin marketing your device as described in your 510(k) premarket notification. The FDA findinq of substantial equivalence of your device to a legally marketed predicate device results in a classification for your device and thus, permits your device to proceed to the market.
If you desire specific advice for your device on our labeling requlation (21 CFR Part 801 and additionally 809.10 for in vitro diagnostic devices), please contact the Office of Compliance at (301) 594-4692. Additionally, for questions on the promotion and advertising of your device, please contact the Office of Compliance at (301) 594-4639. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR 807.97). Other general information on your responsibilities under the Act may be obtained from the Division of Small Manufacturers Assistance at its toll-free number (800) 638-2041 or (301) 443-6597 or at its internet address
"http://www.fda.gov/cdrh/dsma/dsmamain.html".
Sincerely yours,
Timothy A. Ulatowski
Director Division of Dental, Infection Control, and General Hospital Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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## Page _ 1 _ of _ 1
| <strong>Labels</strong> | <strong>Values</strong> |
|---------------------------|------------------------------|
| 510 (K) NUMBER (IF KNOWN) | K983585 |
| DEVICE NAME | LOW PHPHENOLIC 258/CEN-PHENE |
#### INDICATIONS FOR USE :
Is a general for repose as interfact For use in health care settings for low and intermediate level disinfection of hard, non-porsus, increase in the contra suffaces of wheelchairs, medical beds, patient transfer iffs, cruiches, instrument trays, operating tables, surfaces of Pricolonalic, modical paintal chairs, medical lamps, whilipool bathing units, and other medical devices that require low or internediate level disinfection. This product may be used to preclaan or decontaminate attical or non-citical medical devices prior to sterilization or high-loved disintedion. The effectiveness of this product has been documented at a temperature of 68°F (20°C), with a ten minute contact time on the surface being treated.
## (PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
OR Over-The Counter-Use Prescription Use (Per 21 CFR 801 。 109) (Optional Format 1 - 2 -96) (Division Sign-Off) Division of Dental, Infection Control, and General Hospital Devices 510(k) Number _
Two short videos show you everything — or skip straight to the written tutorial if you'd rather read. You can reopen this any time from the Tutorial button in the top bar.
Part 1 — Search, results, and everyday workflows 16 min
Part 2 — Embeddings: the galaxy map 3 min
1. Search: exact and fuzzy
Type a phrase like "coronary artery calcification" into the search box. You get two kinds of results. Exact results match the literal phrase — prefix searches work ("coronary artery calcificati") but suffix searches do not. Fuzzy results match on the meaning and intent of your phrase rather than the exact words, and are sorted by relevance score. Hover over the Exact or Fuzzy badge on any row to see exactly why it matched.
Use the checkboxes above the results to narrow: SaMD keeps only software-only devices, AI / ML keeps only devices with AI.
Exact vs. fuzzy search: what's the difference?
Exact matches on the literal phrase (prefix search works, suffix does not). Fuzzy matches on the meaning and intent of the phrase rather than the exact words. Hover over the badge on any row to see why it matched.
You search "coronary artery calcification" and want only software devices with AI. What two filters do you apply?
Narrow by SaMD (software-only devices), then narrow by AI/ML (devices with AI).
2. The results table
Scroll right in the results table. The intended use is extracted for you — no need to open the PDF. The device story gives a high-level snapshot of what the device does and how it's used. The AI Performance sub-table shows each output name, acceptance criteria, observed values, and development/test dataset descriptions — the same format Innolitics uses for regulatory strategy outputs, and the fastest high-level fingerprint of an AI device. It is AI-generated but has been very reliable in practice.
Where do you find a device's intended use without opening the PDF?
Scroll right in the search results table. The intended use column is extracted for you; no need to dig into the 510(k) summary PDF.
What does the AI Performance sub-table show, and why is it useful?
Output name, acceptance criteria, observed values, development dataset description, and test dataset description. It's the same format we use for regulatory strategy output and Fast 510(k) input, and the fastest high-level fingerprint of an AI device. AI-generated but reliable in practice.
3. Judging fuzzy relevance
Fuzzy results trail off in relevance as you scroll. Use three signals to decide how far down to go: the fuzzy badge explanations, the intended use column, and whether your target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, you're past the relevant zone. A top hit with a low score (~0.4) and a stretched explanation is a hint the closest predicates are far away — the project may be headed for De Novo. Note the fuzzy search is a pattern match: it doesn't handle negation ("not") well, and hardware devices can appear — filter by SaMD/AI ML to cut them.
How do you judge how far down fuzzy search results to go?
Use the relevancy signals: the fuzzy badge explanations, the intended use column, and whether the target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, results are trailing off in relevancy.
4. Device detail page: chat and citations
Click a device name to open its detail page: device facts on the left, a chat window on the right. Ask something like "Describe the training data". The answer carries little citation bubbles — click one to jump to the highlighted passage in the source PDF, so you can verify every AI answer against the document. There's also a Download PDF button for sharing.
How do you verify an AI chat answer on the device detail page?
Click the citation bubbles to jump to the relevant highlight in the source document.
Reading rule for every project: how many summaries do you read in full?
At least the three most relevant 510(k) or De Novo summaries, in full. After that, use targeted chat questions to confirm your memory quickly. The tool supports this professional habit — it doesn't replace it.
5. Side-by-side comparison
Select multiple rows in the results table (aim for under ~10), then open the PDF Viewer tab. Ask one question — it goes to all selected devices in parallel, each with citations. This is the fastest way to compare and contrast devices: training data, PCCP scope, how they handled adding new scanners, and so on.
What does the side-by-side PDF viewer mode do?
Select multiple devices, open the PDF viewer tab, and ask one question (e.g., "Describe the training data"). It queries all selected devices simultaneously with citations, so you can compare and contrast quickly.
6. Collections
With rows selected, go to the Collections tab and create a labeled collection (e.g., "Cobb Angle Project"). Reload that selection any time — before a client call, pull up the collection and ask questions across all of its devices at once.
How do you save a set of selected devices for later use?
Select the rows, go to the Collections tab, and create a labeled collection (e.g., "Cobb Angle Project"). You can reload the selection anytime and carry it into the PDF viewer and other tabs that support selections.
7. Product codes and the regulations tree
Click a product code in the results to jump to it in the regulations tree — identification text, sibling product codes, and devices you can open in a PDF viewer on the right. Click a regulation number to see its identification, special controls, and related product codes. You can also search by product code or regulation number at the top of the tree. Always read the special controls if any exist for your device — it broadens your search and sharpens pre-kickoff research.
What can you do from the regulations tree view?
Browse product codes and regulation numbers, read the identification text and special controls, browse sibling product codes, open device PDFs on the right, and search by product code or regulation number at the top of the tree.
8. Chart view
Click Show Chart and segment by regulation number (or product code) to see which regulations dominate your result set. Clicking a regulation takes you into the regulations tree. Great for spotting that most matches are, say, hardware laparoscopic devices — a cue to go back and filter.
How do you see which regulations dominate a search result set?
Click "Show Chart" and segment by Regulation Number. Clicking a regulation takes you to the regulations tree.
9. The predicate graph
Open the Predicates tab for a family-tree view of predicate relationships. Click a node to trace its parents and children; selections from search carry over pre-selected. Commonly predicated devices are worth reading — a lot of people predicated them for a reason. The visual lineage is also handy on client calls, e.g. to show how a predicate family evolved and justify why your predicate still holds.
In the predicate graph, why are commonly predicated devices worth reading?
A lot of people predicated them for a reason. Clicking a node traces parents and children, and selections from search carry over pre-selected.
10. Embeddings: the galaxy map
The Embeddings tab plots every matching document in a 2-D "galaxy map" where semantically similar devices cluster together. Hover or click clusters to explore, and let AI label the clusters for you. Embeddings beat product codes for grouping: two devices can carry different product codes (LLZ vs. QIH) yet do the same thing — the embedding captures the meaning of the intended use and device story. This is also exactly how retrieval-augmented generation (RAG) works under the hood, and it makes a great visual on client calls.
Try it yourself
Head to the search page and work through a few of these AI/ML fuzzy searches to build intuition: perivascular fat on CT · aortic valve calcification opportunistic screening on noncontrast CT · breast cancer prediction on digital pathology slides · autism detection · gestational age prediction · a hearing aid that can also detect a pulse · foundation model based analysis of ECG · large language models · penetration test. Watch how the relevance scores, intended use, and AI Performance tables tell you when results stop being meaningful.