ACS Manuscript Formatting Guidelines in Word: Author Standards for JACS & ACS Journals

The American Chemical Society (ACS) publishes more than 80 prestigious, peer-reviewed journals spanning synthetic organic chemistry, inorganic synthesis, physical chemistry, chemical biology, materials science, and chemical engineering. Flagship titles—including the Journal of the American Chemical Society (JACS), Organic Letters, ACS Nano,The Journal of Organic Chemistry (JOC), Inorganic Chemistry, and Macromolecules—maintain some of the highest impact factors and citation densities in the scientific world.

All submissions to ACS publications flow through the ACS Paragon Plus submission environment. While the ACS “Fast Format” policy enables flexible initial draft structuring, editorial screening desks execute rigorous technical pre-screening before assigning manuscripts to associate editors. If an author's Word document fails critical document geometry requirements, omits the mandatory Table of Contents (TOC) Graphic, lacks the obligatory Safety and Hazards statement, or presents corrupt chemical structure drawings, the paper is summarily returned without peer review.

This comprehensive 2026 author guide details every technical parameter required to prepare a flawless, publication-ready Microsoft Word document for JACS and ACS journal submissions.

2. Document Geometry: Letter Size & Column Architecture

ACS manuscripts must adhere to strict spatial parameters in Microsoft Word to guarantee clean rendering in the automated Paragon Plus PDF compiler and maintain comfortable reading density for peer reviewers.

The U.S. Letter Invariant (Why ISO A4 Causes Conversion Rejection)

Unlike European and Asian academic publishers that accept ISO A4 (210 × 297 mm), the American Chemical Society enforcesU.S. Letter geometry (8.5 × 11.0 inches / 215.9 × 279.4 mm) across its entire catalog. Because ISO A4 is approximately 18 mm taller and 6 mm narrower than U.S. Letter, documents authored on A4 page setups frequently trigger severe formatting anomalies when ingested by ACS Paragon Plus:

• Running Footer Truncation: Bottom page numbers and footnotes positioned near the A4 bottom margin are sliced off in the Letter-based PDF viewer.
• Wide Reaction Scheme Overflow: Horizontal margins calibrated on narrower A4 paper force ChemDraw reaction arrows and right-most reagents past the 1.0-inch boundary, clipping structural metadata.
• Distorted Page Count Calculations: Journal length estimators miscalculate communication lengths, creating false page-budget alarms for letter-capped article types.

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1Paper size configured to U.S. Letter (8.5 × 11 in / 215.9 × 279.4 mm) for ACS Paragon Plus.

2Margins set to 1.0 in (25.4 mm) Top, Bottom, Left, and Right with 0 in gutter.

3Portrait orientation applied uniformly across all manuscript narrative sections.

Figure 1: Microsoft Word Page Setup dialog configured for U.S. Letter dimensions and 1-inch marginsClose

Figure 1: Set Paper Size to U.S. Letter (8.5 × 11.0 in) with uniform 1.0-inch margins across all margins in the Word Page Setup dialog.

1Paper size configured to U.S. Letter (8.5 × 11 in / 215.9 × 279.4 mm) for ACS Paragon Plus.

2Margins set to 1.0 in (25.4 mm) Top, Bottom, Left, and Right with 0 in gutter.

3Portrait orientation applied uniformly across all manuscript narrative sections.

Before drafting, open Word, navigate to the Layout tab, click Size, and selectLetter. For multi-section manuscripts with portrait and landscape sections, verify that every section break preserves Letter geometry. For complete pre-submission verification steps, consult our Academic Journal Manuscript Submission Checklist.

Single-Column Drafts vs. Two-Column Camera-Ready Templates

One of the most frequent dilemmas encountered by chemistry researchers is whether to write in a standard single-column document or download the official ACS two-column Word template.

ACS provides two-column templates for communications in select journals—such as JACS Communications and Organic Letters—principally so authors can verify that their text, schemes, and tables will not exceed the journal's strict 4-page publication ceiling. However, submitting an initial draft in a rigid two-column template introduces substantial technical liabilities during peer review:

1. Reviewer Fatigue & Marginal Annotations: Two-column layouts cram text into narrow 3.25-inch columns. Reviewers examining drafts on digital tablets or laptops find it challenging to insert margin comments, highlight specific phrases, or follow dense reaction descriptions.
2. Awkward Equation Wrapping: Complex mathematical derivations, kinetic rate laws, and thermodynamic equations frequently span wider than 3.25 inches. In two-column mode, Word breaks fractions and integral signs arbitrarily across lines, obscuring scientific meaning.
3. Fragmented Scheme Anchoring: Large ChemDraw schemes spanning the full page width must be placed inside complex Word section breaks, frequently causing text to jump uncontrollably between columns during revision cycles.
4. Automated PDF Proof Crashes: The Paragon Plus conversion engine occasionally misaligns floating two-column text frames, resulting in overlapping paragraphs and distorted figure placements in the official evaluation PDF.

3. Mandatory TOC Graphic Specifications

Virtually all ACS journals mandate the inclusion of a Table of Contents (TOC) / Abstract Graphic for research articles, letters, reviews, and communications. This graphic functions as the public visual ambassador of your paper: it appears in online tables of contents, search engine indexing results, social media previews, and the opening page of the published article.

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1Exact 3.25 in (8.25 cm) width by 1.75 in (4.45 cm) height dimensional boundary.

2Minimum 300 DPI resolution for photographic halftones; 1200 DPI for chemical line art.

3Clear visual hierarchy highlighting key chemical transformation, catalyst, or mechanism.

Figure 2: ACS Table of Contents Graphic dimension frame showing 3.25 by 1.75 inch boundary and 300 DPI resolutionClose

Figure 2: Ensure the Table of Contents graphic conforms exactly to 3.25 inches wide × 1.75 inches high with 300 DPI resolution and legible typography.

1Exact 3.25 in (8.25 cm) width by 1.75 in (4.45 cm) height dimensional boundary.

2Minimum 300 DPI resolution for photographic halftones; 1200 DPI for chemical line art.

3Clear visual hierarchy highlighting key chemical transformation, catalyst, or mechanism.

Design Principles for High-Impact TOC Graphics

An effective TOC graphic is not a duplicate of Figure 1. Instead, it is a self-contained, visually uncluttered synopsis designed to capture the reader's curiosity while accurately summarizing the scientific breakthrough:

• Focus on the Primary Chemical Transformation: In synthetic papers, showcase the overall reaction equation with prominent starting materials, key reagents, catalysts, and major products with representative yields and enantioselectivities (e.g., “up to 98% yield, >99:1 er”).
• Contrast and Color Palette: Employ clean, contrasting colors that reproduce crisply on white backgrounds. Avoid murky gradients, dark solid background fills, and decorative drop shadows that look muddy when scaled down.
• Eliminate Unnecessary Text: Do not include lengthy methodology sentences, full compound names, or extensive analytical parameters. Use standard abbreviations (e.g., “rt”, “h”, “equiv”, “mol %”).
• Avoid Re-Using Publication Figures: The editorial office specifically checks that the TOC graphic is an original, tailored summary rather than a direct copy-paste of a complex multi-panel figure from the body text.

To prevent Word from automatically degrading the sharpness of your graphics, review our guide on how to prevent Word from compressing images below 300 DPI.

4. Chemical Schemes & ChemDraw 1996 Standards

Chemical structure drawings represent the core intellectual substance of an ACS manuscript. The American Chemical Society has enforced strict graphical consistency across chemical structures since the mid-1990s. The universal benchmark across all ACS publications is the “ACS Document 1996” style profile in ChemDraw.

Configuring ChemDraw ACS Document 1996 Settings

Before drawing reactions or exporting chemical structures for your Word manuscript, open ChemDraw, select File →Apply Document Settings from → ACS Document 1996. This profile configures the following exact geometric parameters:

Schemes vs. Charts vs. Figures: ACS Caption Positioning Rules

In ACS style, visual elements are classified into distinct categories, each subject to specific numbering and caption placement rules:

• Schemes: Depict a sequence of chemical reactions showing the conversion of starting materials into intermediates and products via chemical reaction arrows. The title and caption must appear ABOVE the scheme. Example: Scheme 1. Catalytic Asymmetric Synthesis of Spirocycles.
• Charts: Depict a collection of static chemical structures that do not show reactions (such as a library of screened ligands, natural product analogs, or computational conformations). The title and caption must appear ABOVE the chart. Example: Chart 1. Scope of Chiral Phosphoric Acid Catalysts Evaluated.
• Figures: Depict non-reaction visual data, including NMR/mass spectra, X-ray crystal structure ORTEP plots, kinetic decay curves, chromatograms, and electron micrographs. The caption must appear BELOW the figure. Example: Figure 1. ORTEP drawing of compound 4a with thermal ellipsoids at 50% probability.
• Tables: Display quantitative tabular data (such as optimization yields, screening entries, and crystallographic parameters). Tables must use standard 3-line academic formatting without vertical rules. The caption must appear ABOVE the table.

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1Scheme caption placed directly above the chemical reaction scheme.

2ChemDraw structures formatted using the official ACS Document 1996 profile.

3Synthesized compounds identified by sequential bold Arabic numerals (1, 2a, 3).

Figure 3: Microsoft Word document showing ChemDraw ACS Document 1996 reaction scheme with top caption and bold compound numberingClose

Figure 3: Format reaction schemes using ChemDraw ACS Document 1996 parameters, positioning captions directly above the scheme and labeling compounds with bold Arabic numerals.

1Scheme caption placed directly above the chemical reaction scheme.

2ChemDraw structures formatted using the official ACS Document 1996 profile.

3Synthesized compounds identified by sequential bold Arabic numerals (1, 2a, 3).

For extensive guidance on building clean academic tables in Word, refer to our detailed tutorial on how to format 3-line academic tables in Word. For mathematical expressions and rate laws, consult our guide on formatting equations in Word for journal submission.

5. Compound Numbering & Hierarchy Rules

Chemistry manuscripts require an unambiguous mechanism to link prose discussions to complex molecular structures. The ACS Style Guide establishes a rigorous hierarchy for chemical compound numbering:

1. Sequential Bold Arabic Numerals

Chemical compounds, catalysts, ligands, and isolated synthetic intermediates must be designated by bold Arabic numerals (e.g.,1, 2, 3, 4). Numbers must be assigned in strict chronological sequence as they appear in the manuscript narrative and schemes:

• The first molecule discussed in the text or depicted in Scheme 1 is compound 1.
• Never skip numbers or jump sequences (e.g., discussing compound 1, 2, and suddenly introducing 5).
• Do not reassign an existing number to a different compound later in the text or Supporting Information.

2. Alphanumeric Suffixes for Derivatives and Series

When describing a family of related analogs, substrates, or stereoisomers, use a common bold numeral followed by a bold lowercase letter (e.g., 2a, 2b, 2c, 3a, 3b):

• Substrate scope tables should list starting materials as 1a–1p and corresponding products as 2a–2p.
• Maintain strict pairing: if starting material 1a yields product 2a, starting material 1b must yield product 2b.

3. Stereochemical Descriptors and In-Text Syntax

Stereochemical prefixes—such as (*R*), (*S*), (*E*), (*Z*), *cis*, *trans*, *syn*, and *anti*—must be italicized, enclosed in parentheses where appropriate, and separated from the bold compound number by a hyphen:

• Correct: (*R*)-4a, (*S*)-4a, *trans*-7, *cis*-7.
• Incorrect: *(R)-4a*, R-4a, (R) 4a.

In the running text, when a compound number is used as a parenthetical modifier to a chemical name, enclose it in parentheses: “Treatment of benzaldehyde (3a) with allyltributylstannane...” However, when the compound number stands alone as a noun, omit parentheses: “Oxidation of 3a afforded carboxylic acid 4a in 91% yield.”

6. Experimental Section & Safety Declarations

ACS journals are globally renowned for the reproducibility and rigor of their experimental data. Chemical characterization data must adhere to strict typographical standards, and experimental descriptions must open with an unambiguous hazard disclosure.

The Mandatory Safety & Hazards Statement

ACS editorial policy strictly mandates that authors emphasize any unexpected, new, and/or significant hazards or risks associated with the reported work in the Experimental Section. This safety policy is actively enforced during initial technical screening:

Follow these exact guidelines when authoring your safety statement:

• High-Hazard Chemistry: If your research involves pyrophoric reagents (e.g., *tert*-butyllithium, trimethylaluminum), explosive intermediates (e.g., organic azides, peroxides, diazonium salts), highly toxic gases (e.g., carbon monoxide, hydrogen cyanide), or high-pressure reactors, you must state: “Caution! [Reagent Name] is highly pyrophoric / explosive / toxic and should be handled with extreme care under an inert atmosphere in a certified fume hood with blast shielding.”
• Standard Experimental Procedures (Verbatim House Phrase): When no unexpected or unusually hazardous procedures or materials were used, you must explicitly state: “No unexpected or unusually high safety hazards were encountered during the experimental procedures.”

Spectroscopic Characterization Formatting (¹H and ¹³C NMR)

Synthetic compounds must be supported by complete spectroscopic and physical characterization. Format NMR reporting according to the exact ACS typographical standard:

• ¹H NMR Reporting Order: Chemical shift in parts per million (ppm, δ), integration, multiplicity (s = singlet, d = doublet, t = triplet, q = quartet, m = multiplet, br = broad), coupling constant (*J*) in hertz (Hz) rounded to one decimal place, assignment. Example: ¹H NMR (400 MHz, CDCl₃) δ 7.82 (d, *J* = 8.4 Hz, 2H, Ar-H), 7.34 (d, *J* = 8.4 Hz, 2H, Ar-H), 3.91 (s, 3H, OCH₃), 2.41 (s, 3H, Ar-CH₃).
• ¹³C NMR Reporting Order: Frequency, solvent, and chemical shifts listed in numerical order to one decimal place. Example: ¹³C{¹H} NMR (101 MHz, CDCl₃) δ 167.2, 143.6, 129.8, 127.4, 125.1, 52.1, 21.7.
• HRMS Reporting: Calculated vs. found masses to four decimal places. Example: HRMS (ESI-TOF) *m*/*z*: [M + H]⁺ calcd for C₁₅H₁₆NO₃ 258.1125; found 258.1128.

7. ACS Reference & Citation Mechanics

The American Chemical Society maintains a standardized referencing system that differs notably from social science (APA) and engineering (IEEE) citation formats.

In-Text Citation Models

Depending on the specific ACS journal, in-text citations follow one of two conventions:

1. Superscript Numbers (Standard JACS / JOC / ACS Nano style): Reference citations are placed as superscript numbers outside commas and periods: “...as demonstrated in recent catalytic studies.¹” or “...as synthesized by several groups.²,³⁻⁵”
2. Italic Numbers in Parentheses (Select Physical / Environmental titles): Some journals in chemical physics or environmental engineering use italicized Arabic numbers inside parentheses: “...as described in previous literature (1, 2).”

Bibliography Construction & Typography

Every reference entry in the bibliography must adhere to the following typographical conventions:

• Author Names: Surname followed by initials without periods between initials: Smith, J. A.; Jones, R. B.; Lee, C. K. Authors are separated by semicolons.
• Publication Year: Always set in bold typeface: 2024.
• Journal Volume: Always set in italic typeface: 146.
• Journal Abbreviations: Titles must be abbreviated strictly according to the Chemical Abstracts Service Source Index (CASSI): J. Am. Chem. Soc., Org. Lett., Angew. Chem., Int. Ed., Chem. Sci., ACS Catal.
• Mandatory DOIs: ACS Paragon Plus requires digital object identifiers (DOIs) for all modern citations. Append the full HTTPS DOI at the conclusion of each reference entry: https://doi.org/10.1021/jacs.XXXXXX.

8. Common Technical Rejections in Paragon Plus

When a Word manuscript is uploaded to ACS Paragon Plus, editorial assistants execute a standardized technical screening checklist before the file reaches an associate editor. Reference this comparison matrix to eliminate administrative flags:

If your paper has experienced an administrative unsubmission or technical rejection from an academic portal, review our actionable Journal Technical Check Desk Rejection Checklist and our guide on resolving automated PDF conversion errors in Word.