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Es.chemicalsafetyfacts.org - SEO Checker

Overview of the SEO Check

Meta information

98%

Page quality

70%

Page structure

79%

Link structure

82%

Server

86%

External factors

SEO Score

SEO Score Widget

Response time

1.01 s

File size

66.90 kB

Words

416

Media files

Number of links

43 internal / 9 external

Task list of SEO Improvements 5 Tasks

Add a H1 heading to this page.Very important!
Fix errors regarding the language markup of your web page.Very important!
Improve the page response time.Very important!
Use good alternative descriptions (alt attributes) for your images.Important!
Review and improve the heading structure.Tip!

Meta specifications 98% achieved

Title

(Critically important)

Chemical Safety Facts

The length of the page title is perfect. (202 pixels out of 580 max pixel length)

There are no duplicate words in the title

Meta Title

Meta description

(Critically important)

Get chemical safety information on the products you use every day

The length of the meta description is perfect. (409 pixels out of 1000 max pixel length)

Meta Description

Crawlability

(Critically important)

There are no problems in accessing the website.

Search Engine Crawlers

Canonical URL

(Important)

https://es.chemicalsafetyfacts.org/

There is a valid canonical link specified.

Canonical Tag

Language

(Somewhat important)

Language detected in text: es

Language defined in HTML: es

Language defined in HTTP-Equiv meta tag: es-la

Server location: United States of America

There are different language information within the page markup.

The following language is defined by HTML: es-la

Declaring language in HTML

Alternate/Hreflang Links

(Somewhat important)

There are no alternate links specified on this page.

Hreflang

Other meta tags

(Somewhat important)

There is no rel next meta tag on this page.

There is no rel prev meta tag on this page.

Meta Tags

Domain

(Somewhat important)

This page is hosted on a subdomain. Use a top level domain for better SEO results.

The domain does not contain non-latin characters.

Domain for SEO

Page URL

(Somewhat important)

No parameters were found in the URL.

No session ID was found in the URL.

The URL does not have too many subdirectories.

SEO-friendly URLs

Charset encoding

(Somewhat important)

The charset encoding (UTF-8) is set correctly.

Character Encoding

Doctype

(Nice to have)

The doctype HTML 5 is set correctly.

The doctype is placed at first in the HTML code.

HTML Doctype

Favicon

(Nice to have)

The favicon is linked correctly.

Favicon

Meta tags

Name	Value
viewport	width=device-width, initial-scale=1
msapplication-TileColor	#102b54
theme-color	#ffffff
robots	index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1
description	Get chemical safety information on the products you use every day
msapplication-TileImage	/wp-content/uploads/csf-favicon.svg
generator	WP Rocket 3.17.3.1
article:modified_time	2025-02-11T15:28:54+00:00
lang	es
twitter:card	summary_large_image
og:locale	en_US
og:type	website
og:title	Chemical Safety Facts
og:description	Get chemical safety information on the products you use every day
og:url	https://www.chemicalsafetyfacts.org/
og:site_name	Chemical Safety Facts
og:image	https://www.chemicalsafetyfacts.org/wp-content/uploads/video-poster.jpg
og:image:width	1400
og:image:height	786
og:image:type	image/jpeg
Content-Language	es-la
Content-Type	text/html; charset=UTF-8
charset	UTF-8

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Page quality 70% achieved

Content

(Critically important)

There are only 416 words on this page. Good pages should have about 800 words of useful content.

28.1% of the text are stop words.

Keywords used in the page title are also used in the page content. That's good!

The page contains a listing, which indicates a good text layout.

6 paragraphs were found on this page.

No placeholders texts or images were found.

There are no duplicates on the site.

The average number of words per sentence of 17 words is good.

Content is King

Frames

(Critically important)

This page does not use a frameset.

Frames and framesets

Mobile optimization

(Somewhat important)

A viewport "width=device-width, initial-scale=1" is provided.

At least one Apple touch icon is specified.

Mobile Optimization

Bold and strong tags

(Somewhat important)

The usage of strong and bold tags is perfect. We recommend the use of up to 8 tags for this page.

Strong and Bold Tags

Image SEO

(Somewhat important)

4 images have no alt attribute. The content of alt attributes is used by search engines.

Image SEO

There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.

Social Sharing

Additional markup

(Nice to have)

No additional page markup was found.

HTTPS

(Somewhat important)

This website uses HTTPS to protect privacy and integrity of the exchanged data.

All included files are also transferred via HTTPS.

HTTPS

Media list

URL	Alt attribute	Title
...s.org/wp-content/themes/csf/img/logo.svg	Chemical Safety Facts
...ontent/uploads/video-poster-1024x575.jpg	Video Poster
...terstock_1467182411-scaled-1-800x400.jpg	electrónica fabricada con plástico en una caja
...uploads/shutterstock_79938481-scaled.jpg	colocando apósito en dedo
...en-Shot-2022-05-24-at-3.26-1-596x400.png	Retardantes de llama que se usan en materiales de construcción
...tterstock_521703313-scaled-1-800x400.jpg	Muestras de manchas de pisos de madera
...utterstock_767666125-scaled1-800x400.jpg	Gafas de esquí de BPA
...oads/shutterstock_2148646823-800x400.jpg	No alt attribute provided
...ent/uploads/iStock-183865430-800x400.jpg	No alt attribute provided
...mized-shutterstock_709341439-800x400.jpg	No alt attribute provided
...loads/GettyImages-1533169546-800x400.jpg	No alt attribute provided
...wp-content/uploads/CSF_Logo-01_white.svg	Chemical Safety Facts

Page structure 79% achieved

H1 heading

(Critically important)

There is no H1 heading specified.

H1-H6 headings

Headings

(Important)

The structure of headings is missing one or more levels. Do not skip heading levels.

H1-H6 headings

Heading structure

Heading level	Content
H2	Find a Chemical
H2	Featured Chemicals
H2	Artículos, investigación, información sobre química y más
H3	Use our A-Z list to learn more about common chemicals.
H3	Plásticos
H3	Ethylene Oxide
H3	Flame Retardants
H3	Formaldehyde
H3	BPA (Bisphenol A)
H3	The Science of Candy: Sugar Chemistry
H3	Celebramos el Mes de la Historia Afroestadounidense: tres afroestadounidenses notables especialistas en química
H3	Papel de la química en los ingredientes de las vacunas y seguridad
H3	Cómo la química ayuda a tomar fotografías perfectas
H3	Browse by Category
H3	Chemistry 101
H3	Chemicals

Link structure 82% achieved

Internal links

(Important)

Some internal link anchor texts are too long.

Some anchor texts are used more than once.

The number of internal links is ok.

All internal links are not using dynamic parameters.

Internal Linking

External links

(Nice to have)

There are 9 external links on this page.

External Links

Found links on this page

Link	Attributes	Anchor text
/	Anchor	Ir al contenido
/		IMG-ALT Chemical Safety Facts
/chemistry-101/	Subdomain	Chemistry 101
/chemicals/		Chemicals
/health-and-safety/	Subdomain	Health and Safety
/health-and-safety/		Overview
/health-and-safety/category/ch...	Subdomain	Chemicals & Food
/health-and-safety/category/ch...	Subdomain	Chemistry & Kids
/health-and-safety/category/ch...	Subdomain	Chemicals in the Environment
/health-and-safety/category/ch...	Subdomain	Chemicals & Health
/health-and-safety/category/ch...	Subdomain	Chemical Safety
/about/	Subdomain	About
https://twitter.com/ChemSafety...	New window External	Twitter
https://www.facebook.com/chemi...	New window External Subdomain	Facebook
https://www.youtube.com/channe...	New window External Subdomain	YouTube
https://www.chemicalsafetyfact...	External Subdomain	English
/	New window Subdomain	Spanish
/chemicals/		Browse Chemicals
/chemicals/		View All Chemicals
/chemicals/plastics/		Plásticos IMG-ALT electrónica fabricada con plástico en una caja
/chemicals/ethylene-oxide/		Ethylene Oxide IMG-ALT colocando apósito en dedo
/chemicals/flame-retardants/		Flame Retardants IMG-ALT Retardantes de llama que se usan en materiales de construcción
/chemicals/formaldehyde/		Formaldehyde IMG-ALT Muestras de manchas de pisos de madera
/chemicals/bpa-bisphenol-a/		BPA (Bisphenol A) IMG-ALT Gafas de esquí de BPA
/health-and-safety/the-science...	Subdomain	Chemicals & Food 10 de febrero de 2025 The Science of Candy: Sugar Chemistry Este Día de San Valentín, obtenga información acerca de los aspectos químicos de...
/health-and-safety/celebrating...	Subdomain	Chemicals & Health 5 de febrero de 2025 Celebramos el Mes de la Historia Afroestadounidense: tres afroestadounidenses notables especialistas en química Los c...
/health-and-safety/vaccine-ing...	Subdomain	Chemicals & Health 7 de septiembre de 2024 Papel de la química en los ingredientes de las vacunas y seguridad Las vacunas son consideradas uno de los diez ma...
/health-and-safety/how-chemist...	Subdomain	Chemicals in the Environment 17 de octubre de 2024 Cómo la química ayuda a tomar fotografías perfectas La fotografía es una fascinante combinación de arte y ...
/health-and-safety/category/ch...	Subdomain Text duplicate	Chemical Safety
/health-and-safety/category/ch...	Subdomain Text duplicate	Chemicals & Food
/health-and-safety/category/ch...	Subdomain Text duplicate	Chemicals & Health
/health-and-safety/category/ch...	Subdomain Text duplicate	Chemicals in the Environment
/health-and-safety/category/ch...	Subdomain Text duplicate	Chemistry & Kids
/health-and-safety/	Subdomain	Browse All Articles
/chemistry-101/		Learn the Basics
/chemicals/		View Chemicals
/	Subdomain Text duplicate	IMG-ALT Chemical Safety Facts
/chemistry-101/	Subdomain Text duplicate	Chemistry 101
/chemicals/	Text duplicate	Chemicals
/health-and-safety/	Subdomain Text duplicate	Health and Safety
/health-and-safety/category/ch...	Subdomain Text duplicate	Chemicals & Food
/health-and-safety/category/ch...	Subdomain Text duplicate	Chemistry & Kids
/health-and-safety/category/ch...	Subdomain Text duplicate	Chemicals in the Environment
/health-and-safety/category/ch...	Subdomain Text duplicate	Chemical Safety
/health-and-safety/category/ch...	Subdomain Text duplicate	Chemicals & Health
/about/	Subdomain Text duplicate	About
/disclaimers/	Subdomain	Disclaimers
https://twitter.com/ChemSafety...	New window External Text duplicate	Twitter
https://www.facebook.com/chemi...	New window External Subdomain Text duplicate	Facebook
https://www.youtube.com/channe...	New window External Subdomain Text duplicate	YouTube
https://www.americanchemistry....	New window External Subdomain	Terms
https://www.americanchemistry....	New window External Subdomain	Privacy Policy

Server configuration 86% achieved

HTTP redirects

(Critically important)

This page redirects to "https://es.chemicalsafetyfacts.org/"

WWW Redirect

HTTP header

(Important)

No X-Powered HTTP header is sent.

The web server transmits the web page (HTML) in compressed form.

HTTP headers

Performance

(Somewhat important)

The page response time is slow (1.01 seconds). The response time should be less than 0.4 seconds. Slow websites are bad for search engine bots and also result in bad user experience.

The file size of the HTML document is fine (67 kB).

Page Speed

HTTP Response Header

Name	Value
date	Mon, 11 Aug 2025 05:38:35 GMT
content-type	text/html; charset=UTF-8
content-length	13162
server	Apache
strict-transport-security	max-age=63072000; includeSubDomains; preload
x-frame-options	SAMEORIGIN
x-content-type-options	nosniff
accept-ranges	bytes
cache-control	max-age=0
expires	Thu, 06 Mar 2025 20:34:35 GMT
content-encoding	gzip
x-onelinkprocessing	quick
x-onelinktook	init: 0 msecs, fetch: 0 msecs, parse+trans: 0 msecs, other: 2 msecs, total: 2 msecs
x-onelinkcachepath	/onelink/www.chemicalsafetyfacts.org/6666CD76F96956469E7BE39D750CC7D9/
x-onelinkhost	ip-10-50-111-182.ec2.internal (NVA-AS-CLUSTER-08-C)
x-onelinkservicetype	onelink.fcgi
last-modified	Thu, 06 Mar 2025 20:11:31 GMT
statuscode	200
http_version	HTTP/2

External factors 3% achieved

Backlinks

(Critically important)

This page has only a few links from other websites.

This page only has backlinks from 1 referring domains.

This page only has 3 backlinks.

This page only has few backlinks from 1 different ip addresses.

Backlinks

Links from Wikipedia

No links from Wikipedia were found.

Robots.txt

# START YOAST BLOCK
# ---------------------------
User-agent: *
Disallow:

Sitemap: https://www.chemicalsafetyfacts.org/sitemap_index.xml
# ---------------------------
# END YOAST BLOCK

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es.chemicalsafetyfacts.org

Chemical Safety Facts

Get chemical safety information on the products you use every day

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

Keyword	Result	Recheck
Chemical Safety	79%	Check
chemical safety facts	73%	Check
facts	61%	Check
Chemicals	56%	Check
Health and Safety	49%	Check
Chemicals Health	47%	Check
Chemicals Food	47%	Check
View Chemicals	47%	Check
information	46%	Check
products	46%	Check
day	46%	Check
Chemistry	43%	Check
list	43%	Check
Follow Us	43%	Check
de febrero	42%	Check
de 2024	42%	Check
BPA	40%	Check
febrero de 2025	40%	Check
American Chemistry Council	39%	Check
Browse	38%	Check
Find	38%	Check
learn	38%	Check
Science	38%	Check
Historia	38%	Check
Afroestadounidense	38%	Check

Show more keywords and terms

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Es.chemicalsafetyfacts.org - SEO Checker

Task list of SEO Improvements 5 Tasks

Meta specifications 98% achieved

(Critically important)

(Critically important)

(Critically important)

(Important)

(Somewhat important)

(Somewhat important)

(Somewhat important)

(Somewhat important)

(Somewhat important)

(Somewhat important)

(Nice to have)

(Nice to have)

Meta tags

Automatically check es.chemicalsafetyfacts.org including all subpages at once!

Page quality 70% achieved

(Critically important)

(Critically important)

(Somewhat important)

(Somewhat important)

(Somewhat important)

(Nice to have)

(Nice to have)

(Somewhat important)

Media list

Page structure 79% achieved

(Critically important)

(Important)

Heading structure

Link structure 82% achieved

(Important)

(Nice to have)

Found links on this page

Server configuration 86% achieved

(Critically important)

(Important)

(Somewhat important)

HTTP Response Header

External factors 3% achieved

(Critically important)

Links from Wikipedia

Robots.txt

Similar sites

Search preview

Most important keywords

Automatically check es.chemicalsafetyfacts.org including all subpages at once!

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